the period tells us the number of ______ an element has.
A. Valance electrons
B. energy levels
Answer:
B) Energy Levels
What is a water system? Explain.
Examples of water systems in USA.
Answer: Its a type of "network." A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply.
Explanation: Schools, factories, office buildings, and hospitals which have their own water systems. Transient Non-Community Water System (TNCWS): A public water system that provides water in a place such as a gas station or campground where people do not remain for long periods of time
How is a strand of DNA like a sentence?
Answer:
DNA molecules are composed of four nucleotides, and these nucleotides are linked together much like the words in a sentence. Together, all of the DNA "sentences" within a cell contain the instructions for building the proteins and other molecules that the cell needs to carry out its daily work.
Explanation:
A strand of DNA is much like an extremely long sentence that uses only four letters. DNA actually has two strands, much like a zipper and the nucleotides are like the teeth of that zipper. This two-strand system is the key to how DNA is able to make copies of itself.
Help! Will give brainlist!
Answer:
Organic compound: 1) found naturally in or produce by living things or 2) it contains carbon
Inorganic compound: does not come form living things
Explanation:
Organic molecules associated with living organisms are also called biomolecules. Organic compounds are molecules that contain carbon atoms covalently bonded to hydrogen atoms (C-H bonds).
it was believed that chemical synthesis could occur only in living organisms and organic compounds were defined as coming from living organisms, whereas inorganic compounds come from nonliving sources.
I hope this helps.
Which of these is an accurate description of convection
Answer:
The movement of materials based on differences in temperature and density, I believe
Explanation:
Determine the atomic number, mass number, and number of neutrons in
Answer:
mass number = protons + neutrons i guess
After a product is released from its active site, a(n) ______ can be used again in another reaction because it is not consumed or altered in the reaction.
Answer:
Enzyme.
Explanation:
Enzymes act as a catalyst in all reaction but remain unchanged by the process.
Which of the following is a way humans use trees?
a. paper
b. food
C. wood
d. all of the above
Please select the best answer from the choices provided
because all students really need to have so may papers
hope it helpsAnswer:
All of the above.Reason:paper we get from trees in which we write even many knowledge and valuable things are written in paper which is of tree only.
food is necessary for human being to live stain live. it is because of food only.
wood is needed during the winter to keep ourselves warm it is also needed in cooking food at many villages and towns. and the main thing coal by which we get electricity is also made from wood only.
Which item is made from a basic ingredient? (2 points) Soap Tea Wine Vinegar
Answer:wine
Explanation:it’s made from grapes
An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) ________.
Answer:
ion
Explanation:
An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) ________.
ion
An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) " ion".
What are lost electrons?A positively charged atoms has lost electrons.
An Electron are easy to remove from the atom, electron has negative charge. Initially; atom is neutral that is the charge of electron is equal to the charge of the proton, when atom loose some of its electron, the net charge of electrons is less than the net charge of the Protons makes the atom positively charged.
An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) " ion".
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Properties of a gas are..
-no definite shape or volume
-has definite shape, does NOT
-have definite volume
-has definite volume AND shape
-none of the above
ASAP need help
the answer would be none of the above.
Are there elements with the same atomic number
Explanation:
No because each has specific atomic number and atomic mass
a. Identify the steps of the scientific method?
b. 1. What was the scientific question for this experiment?
b. 2. what hypothesis did the scientist form from the question?
b. 3. What prediction could be used to test the hypothesis?
b. 4. What did the control group consist of?
b. 5. How were the data presented?
b. 6. Was the hypothesis supported or rejected by the data? Explain your answer.
b. 7. Name on possible source of error or bias in this expirement?.
b. 8. How did the fact that the article was not peer reviewed affect the scientist?
Answer:
1. The steps of the scientific method consist of seven things: Ask a question, get the research needed for a experiment, (What are you trying to find out? What materials do I need to complete the experiment? What are the procedures needed to complete the experiment?) create a hypothesis, (your educated guess on what you think the results of the experiment will be) conduct a experiment (complete multiple different trials preferably three) to test your hypothesis, make observations and record data during the experiment, draw a conclusion, (Was your hypothesis correct? Yes or no and explain why it is wrong or right) present your findings.
2. A hypothesis is a educated guess that the scientist believe will be the answer at the end of the experiment which is why they conduct a experiment in the first place to find viable data that will support their hypothesis.
3. Predictions consist of theories that will test the hypothesis (educated guess) because they're the reasoning to why you believe your guess is correct.
4. A control group consists of variables that do not go through change during a experiment, things that remain the same.
5. Data can be presented in many different ways in the form of graphs, charts, or a research paper. You find the data by completing multiple different trials in a experiment, to make sure you have valid results to write down in your data research.
6. Remember that your hypothesis is your educated guess at the beginning of the experiment, what YOU thought was going to happen during the experiment and if the data you received during the experiment supports your hypothesis.
7. Your procedures, perhaps you measured a variable wrong, perhaps you used to much, or to little of a variable, all depends on your experiment.
8. Having people review and test your data by conducting their own experiments will not only make sure that your data is valid but it insures you even more of your conclusion, making it more accepted by other scientists.
Hope this helps.
which is the fulcrum?
A.C
B.E
C.A
D.B
E.C
Answer:
C
Explanation:
2. Rust forming on a piece of iron is an example of which of the following:
A. A physical change because the process can be reversed
B.
A chemical change because oxygen atoms from the atmosphere bonded with the iron atoms
C.
A violation of the laws of physics because new mass has been created
Answer:
B.
Explanation:
Rust is a chemical change because you can not undo it. Rusting of iron is a chemical change because a new substance iron oxide is formed. The presence of oxygen and water or water vapour is essential for rusting.
What is the name of these two molecules?
Answer:polyatomic molecules
Explanation:molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.Characteristics of molecules
The division of a sample of a substance into progressively smaller parts produces no change in either its composition or its chemical properties until parts consisting of single molecules are reached. Further subdivision of the substance leads to still smaller parts that usually differ from the original substance in composition and always differ from it in chemical properties. In this latter stage of fragmentation the chemical bonds that hold the atoms together in the molecule are broken.
What is the answer for this question down below?
Answer:
This is a potassium because it's atomic number is fifteen
What is the wavelength of light in nm with energy of 6.95 x 10^-27 J?
Answer: 27 Hope it helps u
help me out real quick
Answer:
Copper reacts in acid
It has a high boiling point
Explanation:
what is lattice energy and how is it involved in an ionic bond
Answer:
Lattice energy is an estimate of the bond strength in ionic compounds. It is defined as the heat of formation for ions of opposite charge in the gas phase to combine into an ionic solid.
Explanation:
How do you solve this ?
Answer:
you'd take 3.03 and divide it by a mole that x100? maybe?
ILL GIVE YOU BRIANLIEST! PLEASE HELP: Every compound is a molecule, but every molecule is not a compound. Why is this? Give an example with your answer.
Answer:
A molecule can be made up of two atoms of the same kind:)
Explanation:
hope that helps:))
Answer:
Explanation:
A compound is a makeup of molecules.
Every organism is made up of an atom.Combined atoms can create a moleculeCombined molecules can create a compound.When you make a compound, you are combining molecules. But when you make a molecule, you are not combining compounds, you are combining atoms.
Examples:
Atoms:
[tex]\mathrm{H}[/tex] (hydrogen) and [tex]\mathrm{N}[/tex] (nitrogen)
Molecules:
[tex]\mathrm{H_2}[/tex] and [tex]\mathrm{N_2}[/tex]
Compounds:
[tex]\mathrm{H_2SO_2}[/tex] and [tex]\mathrm{NaCL}[/tex]
Take a look at the Compounds and Molecules section. The [tex]\mathrm{H_2}[/tex] in the example of a molecule is in one of the examples of the compounds, but the [tex]\mathrm{H_2SO_2}[/tex] (THE WHOLE THING) is not in the molecule. This shows how every compound is a molecule, but every molecule is not a compound.
What's the boiling point of water at 0 atmospheric pressure?
Answer:
The water will evaporate and fly out of the bucket; the process will not stop until there is enough water vapor in the atmosphere that the vapor pressure stops the water from boiling further.
Explanation:
the middle of an atom is called?
Answer:
In the middle of every atom is the nucleus
Explanation:
The nucleus contains two types of subatomic particles, protons and neutrons.
Answer:
the middle of an atom is called nuclear which contains total number of protons and total number of neutron
The average yearly temperatures and latitudes of four cities are shown in the table above. Which of the following is demonstrated by the cities in the table?
a As latitude decreases, average yearly temperature generally increases.
B.
Climate is only influenced by latitude in the Southern Hemisphere.
C.
As latitude decreases, average yearly temperature generally decreases.
D.
The climate of an area is never influenced by the region's latitude.
Answer:
.
C.
As latitude decreases, average yearly temperature generally
Answer:
Wanna
Explanation:
J. Oing a meet its going to be fun yzn-dggf-jcq
The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. What is the bond length of this compound
Answer:
80.2
Explanation:
we subtract 18.2 from the total percentage which is 100%
The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. Therefore, the bond length of this compound will be 1.270 angstrom.
What is dipole moment?
Dipole moment results due to the separation of charges in a compound. Dipole moment can occur between the two ions present in an ionic bond or between the atoms present in a covalent bond. Dipole moment occurs due to the differences in electronegativity of atoms. The larger the difference in electronegativity between ions, the larger the dipole moment of the compound.
The bond length of the compound can be calculated with the help of the formula:
Measured dipole moment = 1.11 D
Theoretical bond length = 4.8×bond length
Percentage ionic character = (μ₁ / μ₂) × 100
where, μ₁ = μ theoretical,
μ₂ = μ experimental
Putting the values in formula we get,
18.2 = (1.11/ 4.8 × bond length) × 100
Bond length = (1.11/ 4.8 × 18.2) × 100
Bond length = 111/ 87.36
Bond length = 1.270
Therefore, the bond length of the dipole is 1.270 angstrom.
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In Scratch, when making the jump command for a sprite to jump if the space bar is pressed, you place the command outside the hexagon.
A.
True
B.
False
game design help me plz 25pts and brainliest
Answer:
that would be true you place it outside the hexagon
Explanation:
Answer:
False
Explanation:
Did on Edge
I need this asap please help
Answer:
A
Explanation:
A, because the chemical causes a varies of heat waves that warms your hand but it also create good light to see in the dark
Why does a hot air balloon float? use all the words: less dense, kinetic energy, heat, force, molecules, faster, pressure, temperature, fire, volume, increase, more, same mass, increased volume, inside the balloon
Answer:
A hot air balloon floats because, the air inside of the balloon is more dense than the air outside the balloon. The air inside the balloon is a hotter temperature and has more kinetic energy as more molecules move faster. And has to be heated enough to carry the amount of passengers and it all depends on mass. The pressure of the outside air is supporting the hot air balloon by force and the fire uses its heat to makes the balloon air increase in temperature therefore making the balloon float up because heat rises. The air inside the balloon expands and has increased volume.
What takes the place of ounces in the metric system?
Answer:
Liters
Explanation:
Ounces determine weight, when you want to convert ounces to the metric system you have to convert it to liters. For example one ounce would equal 29.5735 milliliters means it is now in the metric system and will assist with finding the volume of a shape. Which means your answer is "liters."
Hope this helps.
