Answer:17
Explanation:
i agree
which of these atoms are electrically neutral?
Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge. Ions are atoms that have gained or lost electrons.
Answer:
the blue
Explanation:
if an atom contains equal numbers of protons and electrons, the atom is described as being electrically neutral.
What is the main difference between a chemical and a physical change? Use examples to support your answer.
Answer:
Physical changes are usually about physical states of matter. Chemical changes happen on a molecular level when you have two or more molecules that interact. Chemical changes happen when atomic bonds are broken or created during chemical reactions.
Explanation:
Example of an chemical reaction: explosion
Example of an physical reaction: Ice melting
Plz put me in the brain list
Examples of physical changes are freezing, melting(melting of ice cubes).
Examples of chemical changes are combustion, rusting of iron.
A physical change is a change that alters the physical properties of matter particularly the form and state. In many cases, the change is easily reversible. Examples are freezing, melting(melting of ice cubes). A chemical change is a change in which a new kind of matter is formed. It is always accompanied by energy changes which can either be evolution or absorption of heat or light or both. The process is not reversible. Examples are combustion, rusting of iron, precipitation, e.t.c. An example of chemical change which we see in our daily life is the conversion of milk to curd.
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Which statement best describes what happens to protein when a steak is cooked?
A)It denatures and coagulates during cooking.
B)It decreases in size as amino acids are lost.
C)It loses bacteria because they are denatured.
D)It undergoes polymerization to form longer chains.
Pls ill give brainliest
Answer:
The answer is A
Explanation:
I got it right on Edg
current flows between the reigons of opposite electrical charge, forming a _________.
Answer:
Lightening bolt
Explanation:
can someone please help me ill mark brainliest and lots of points please help me someone that likes helping people please help mee thank you
Answer:
1) B and 2) D
Explanation:
when scientists refer to the naked eye, it is referring to the eye without any sort of magnifying device, such as a microscope. Algae blooms can result naturally or by human interference
Which part of an atom is involved in chemical reactions?
A.nucleus and its particles
B.negatively-charged particles
C.neutrally-charged particles
D.positively-charged particles
Answer: Valence electrons are involved in a chemical reaction.
Explanation:
A chemical reaction takes place when there is an involvement of valence electrons. Bond formation involves either sharing of valence electrons or transfer of valence electrons. Bond breaking involves the separation of valence electrons.
When valence electrons are shared between the atoms, it leads to the formation of covalent bond.
When transfer of electrons takes place from one atom to another atom, it leads to the formation of ionic bond.
Hence, valence electrons are involved in a chemical reaction.
I think is A
The part of an atom is involved in chemical reactions is the nucleus and its particles. Therefore, option A is correct.
What is chemical reaction ?In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.
Breaking chemical bonds between reactant molecules (particles) and creating new bonds between atoms in product particles are two aspects of chemical reactions (molecules). While there are the same number of atoms both before and after the chemical transition, there will be a change in the number of molecules.
The electron cloud is the area of the atom that participates in chemical reactions. The region of the atom that surrounds the nucleus is known as the electron cloud. The electron cloud contains electrons, which are the particle in charge of causing the reaction to take place.
Thus, option A is correct.
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Which reaction is more likely to involve a form of combustion (exothermic)? Explain your reasoning.
Answer:
The general equation for an exothermic reaction is: Reactants → Products + Energy.
I’ve been stumped on this, can someone please help? Thanks!
Answer:
Adapt, growth, and reproduction
Explanation:
would be some but that's all i know i think sorry :(
Answer:
Properties of Life. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Explanation:
hope this help also brainlest maybe?
Which statements are true?
All landforms have the same combinations of elevation and relief.
Different landforms have different combinations of elevation and relief.
Elevation is the height of a feature above sea level.
Relief is the height of a feature below sea level.
Relief is the difference between the highest and lowest points in an area.
A scientist is studying a compound that includes nitrogen, carbon, oxygen, and hydrogen. Is the scientist studying an organic molecule? Why or why not?
Answer: It is an organic molecule
Explanation:
In order for a molecule to be organic, it has to contain both carbon and hydrogen. The compound that the scientist is studying contains both.
Gold atoms can be identified based on the number of which subatomic particles?
A.neutrons
B.electrons
C.nuclei
D.protons
Answer: A
Explanation:
A Gold (Au) atom has 79 protons and 79 electrons. A typical gold atom has 118 neutrons, though there are 18 other radioisotopes discovered so far. 79 is its charge (atomic number), which is both its proton number and electron number
An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?
A.50 protons, 69 electrons, 50 neutrons
B.50 protons, 50 electrons, 69 neutrons
C.69 protons, 50 electrons, 69 neutrons
D.69 protons, 69 electrons, 50 neutrons
What types of organisms are most affected by brinicle formation? What are the dangers of brinicles?
1. List regions experiencing high pressure.
2. Based on the weather shown in Florida, is Florida experiencing high or low
pressure? How would you indicate this on the map above?
3. What kind of front is the South experiencing?
4. Based on this information, what kind of weather do you think the southern part of
the United States is experiencing?
#5. What does this mean about the current weather conditions in Florida?
#6. What does this mean about the current weather conditions in the state of Washington?
Answer:
its the big c
Explanation:
After studying chemical reactions in school, Jen examined some of the different ways people use synthetic materials. She found that there are a variety of ways people use them. What are some of the ways people use these materials and why?
Please help out
Why were the iron fillings in a water a suspension?
A green box contains a blue box and a pink box. The blue box contains C H subscript 4 + 2 O subscript 2. An arrow then leads in the green box to the pink box, which says C O subscript 2 + 2 H subscript 2 O. Lines lead from labels to parts of the boxes. Label A leads to the beginning of the green box. Label B leads to the + in the blue box. Label C leads to the arrow. Label D leads to the 2 in 2 H subscript 2 O. Label E leads to the end of the pink box.
Identify each part of this chemical equation that describes the burning of methane and oxygen.
B (blue box):
D (number):
E (purple box):
Answer:
A (the entire green box):
✔ chemical equation
B (the blue box):
✔ reactants
C (the arrow):
✔ reacts to form
D (the number):
✔ coefficient
E (the purple box):
✔ products
Answer:
A chemical equation
B reactants
C reacts to form
D coefficient
E products
Explanation:
hope this helps, the person above me is also correct
Fossil fuels are commonly used as a source of energy because _____.
fossil fuels are most readily available.
fossil fuels are a renewable resource.
fossil fuels are best for the environment.
fossil fuels are cost-effective.
Answer:
fossil fuels are cost-effective.
Answer:Fossil fuels are most readily available and fossil fuels are cost-effective.
Explanation:i got this right on my class have a great day!!!=D
A. On the Periodic Table of Elements, columns are called ______________________; all of these
elements
have the same number of ___________________________.
B. On the Periodic Table of Elements, rows are called _____________________; all of these have the same
number of __________________________.
On the Periodic Table of Elements, columns are called groups ,all of these elements have same number of valence electrons and the rows are called periods and have same number of valence shells.
Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
Thus, columns are called groups ,all of these elements have same number of valence electrons and the rows are called periods and have same number of valence shells.
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Jamie completes the following steps in an experiment to investigate how temperature affects how fast something will rust in water. He places a nail in a bowl of water in the sun and a nail in a bowl of water in the shade. He also leaves an iron nail out of the water in a dry bag out of the sun. Why would Jamie leave one out of the water and out of the sun?
A Jamie also wants to test if the water affects how fast the iron nail will rust.
B Jamie notices that the size of the nail is different, so he does not want to use it later.
C Jamie doing all these steps to create a control group to compare his results to.
D Jamie puts the nail in a cooler place to see if it will rust as fast as the other items.
Jamie notices that the size of the nail is different, so he does not want to use it later. Thus option B is correct.
What is rusting?Rusting is defined as a rust, a combination of iron oxides, forming on the surface of iron objects or structures.
It can also be defined as a typically reddish-brown oxide generated by the catalytic interaction of iron and oxygen in the presence of water or air moisture.
Rusting is an oxidation reaction.
Oxidation is defined as a type of reaction in which the loss of electrons or the increase in the oxidation state of a molecule or its constituent atoms.
It can also be defined as a process in which atoms or groups of atoms lose electrons.
Thus, Jamie notices that the size of the nail is different, so he does not want to use it later. Thus option B is correct.
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What happens to a wooden log when it is burned?
A.It is completely destroyed.
B.It is completely changed into heat energy.
C.It changes into other types of matter and energy.
D.It physically changes into the gaseous phase.
Answer:
I would say c.
Explanation:
It is transformed into new energy
ok please help
which goes where and why??
Answer:
well the first one is radiation the second one is conduction and the third one is convection. hope this helps! :)
Explanation:
Jamie completes the following steps in an experiment to investigate how temperature affects how fast something will rust in water. He places a nail in a bowl of water in the sun and a nail in a bowl of water in the shade. He also leaves an iron nail out of the water in a dry bag out of the sun. Why would Jamie leave one out of the water and out of the sun?
A Jamie also wants to test if the water affects how fast the iron nail will rust.
B Jamie notices that the size of the nail is different, so he does not want to use it later.
C Jamie doing all these steps to create a control group to compare his results to.
D Jamie puts the nail in a cooler place to see if it will rust as fast as the other items.
Answer:
C
Explanation:
A student looking for an element that will bond with sodium (Na) knows that table salt is a compound of sodium and chlorine (Cl). Based on this information, which of the following elements would MOST likely bond with sodium?
A.argon (Ar)
B.bromine (Br)
C.calcium (Ca)
D.potassium (K)
According to the concept of electronic configuration and valency sodium is most likely to bond bromine.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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please help!!!!!!!!!!!!!!!!!!!!!1
Steve fills a jar with water and adds Epsom salts and ammonia. After five minutes, he observes that white particles have formed and settled at the bottom of the jar. Steve is unable to change these particles back to any of the three original substances by heating or stirring the solution. He isolates the white particles and finds that they have properties that are very different from any of the three starting materials. Which statement BEST explains Steve's observation?
Group of answer choices
A physical change occurred because no color change was observed.
A chemical change occurred because a new substance formed.
A physical change occurred because stirring did not change the solution.
A chemical change occurred because a solid substance formed.
Hey can you help thanks
What was surprising or interesting to learn about the very small organisms and objects in today’s lesson? *
What other questions do you have about microorganisms? *
Answer:
Explanation:
Cells in the body
Cell is surprising or interesting to learn about the very small organisms and objects in today’s lesson.
What is cell?Cell is defined as the basic unit of life or it has been structural or functional unit of life. Cell contain many cell organelles and all the cell organelles have various functions such as nucleus is the brain of the cell and it controls all the function of the cell.
Cell is of two types eukaryotic and prokaryotic cell and the cell which are advanced and developed is known as eukaryotic and the cell which are not much developed and does not contain cell organelles is known as prokaryotic cell. Cell contain many cell organelles and all the cell organelles have various functions such as nucleus is the brain of the cell and it controls all the function of the cell.
Multicellular organism is made up of eukaryotic cell and unicellular is made up of prokaryotic cell. Cell is always developed from pre existing cell and it has been the structural and functional unit of life. Cell is the building block of an individual.
Therefore, Cell is surprising or interesting to learn about the very small organisms and objects in today’s lesson.
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In the 1700s, Isaac Newton determined that the force of gravity between two objects depends on the mass of the objects and distance between them. He reasoned that things fall toward Earth because it has so much mass. Then in the 1900s, Albert Einstein worked with new discoveries, such as the fact that light always travels the same speed, and he determined a new explanation of how and why gravity works. Mass and distance still matter in Einstein’s explanation, but speed also matters. Newton’s explanation still works for objects close to Earth, but Einstein’s explanation works for all of the objects in the universe.
Which of the following is the best way to explain how baking a cake or frying an egg is a chemical change?
A Both are changing size and shape.
B Heat is changing the texture of both substances.
C Heat is being added to both, causing a phase change.
D The end products of both cannot be reversed to their original forms.
Answer:
I think C if not then B
Explanation:
Heat will change the product and will become a chemical change.
Answer:
D
Explanation:
because you literately cant change it back
to its original form also chemical change means something is permanently
changed so when you bake a cake or fry an egg there is no way possible to change it back
The combination
nation of two or more atoms from same or different elements creates a(n)
Which phrase provides the best definition of a landform region?
A a large area where the topography contains the three main landforms
B the border where two different landforms meet
a large area where the topography is made up of one landform
C a large area where the topography is inconsistent and contains multiple landforms
Answer:
a large area where the topography is made up of one landform.
