Answer:
they are called isotopes
Why do elements form chemical bonds?
Answer:
to make them more stable by filling up electrons
What does an atomic number represent in an atom?
A) number of electrons
B) number of protons
C) number of protons and neutrons
D) number of neutrons
Answer:
C, number of protons and neutrons
If an atom has 18 protons,17 neutrons,and 19 electrons what is the atom electrical charge?
A +2
B +1
C -2
D-1
Answer:
D: -1
Explanation:
18 protons so +18
19 electrons -19
neutrons dont count there neutral
-19+18= -1
Answer: D: -1
Explanation: All protons have a +1 charge, neutrons are neutral, and electron have a -1 charge. Therefore it can be concluded that if the atom has 18 protons which all have +1 charge and 19 electrons which all have -1 charge, then the atom will have a -1 charge since 18-19=-1
This occurs when energy is added or removed
Answer:
melting
Explanation:
Answer:
physical change
Explanation:
i googled it and that's what came up sry if it's wrong (change of state came up too if that doesn't work)
Why do space objects fall to earth
Answer:
gravity
Explanation:
hope this belps
The space objects fall to earth because of the gravitational force of the earth. Earth pulls all objects towards itself by gravity.
What is gravity?Every object and person in their respective locations can be attributed to the force of gravity. It lends an object weight. Everyone will be floating in the air if there is no gravity.
Differing locations experience different levels of gravity. Similar to the earth, there is a strong gravitational pull. There is the less gravitational pull on the moon. In mars, there is less gravitation force than on earth.
The gravitational force pulls all objects towards itself, that is why if an object from space falls, it falls towards the earth. The gravitational force is very high on Earth.
Thus, due to gravity on earth, all space objects fall to earth.
To learn more about gravity, refer to the below link:
https://brainly.com/question/12054584
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What element is represented by this configuration: [Ar]452*
Be
Mg
Ca
Na
Answer:
its sulfur
Explanation:
that's what Google says
What is the correct chronological order of scientists contributing to the modern periodic table?
1. Lavoisier, Newlands, Moseley, Dobereiner, and Mendeleev
2. Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
3. Moseley, Mendeleev, Newlands, Dobereiner, and Lavoisier
Answer:
the second one-Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
Answer:
Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
Explanation:
Edge 2021
The compound acetaldehyde most likely contains the functional group shown below:
-C-
downwards equal sign
O
true or false.
True
Further explanationAldehydes are alkane-derived compounds containing the functional group (-CO-) located at the end of the parent carbon chain
The general structure is R-CHO with the molecular formula CnH2nO
Naming is generally the same as the alkane by replacing the suffix with -al
Acetaldehyde(ethanal) is an aldehyde which has 2 C atoms with formula
[tex]\boxed{\bold{C_2H_4O}}[/tex]
The bond between the C atom and the O atom is a double bond
So the C atom has a single bond with H and alkyl and double bonds with O
R - C - H
||
O
Find the volume of a gold ring that has a mass of 12.00 grams. The density of gold is 19.30 g/mL. The volume is
Answer:
The answer is 0.622 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass = 12 g
density = 19.30 g/mL
We have
[tex]volume = \frac{12}{19.30} \\ = 0.62176165...[/tex]
We have the final answer as
0.622 mLHope this helps you
If you can run 3 miles in 19 minutes. What is your pace in kilometers per hour?
Report your answer with 3 significant figures. (1 km = 0.621371 miles)
Answer:
10.1389
Explanation:
Which family does this element belong to? It sa reddish brown liquid with
an amber vapor, It is very reactive and it has a pungent odor that is
irritating to the skin, eyes, and respiratory
Alkali Metals
Alkaline Earth Metals
Halogens
Noble gases
Answer:
The correct answer is - halogen.
Explanation:
The physical properties of the given elements are identical to the physical properties of the free bromine which is a reddish-brown liquid that has a pungent odor and highly reactive. It has an appreciable amber vapor at 25 degrees (room temperature).
Bromine is a halogen and like other halogens, it is also present in the diatomic molecule and located in the 17th group or VII A group of periodic tables. Exposure of the bromine causes irritation to the eyes, skin and respiratory system.
what is a divalent union
Answer:
. A divalent cation is an cation with valence of 2+. This type of ion may form two chemical bonds with anions.
Explanation:
Please mark as brainliest
How many atoms are in 0.0745 mol K?
1. 27159200000000000000000
2. 37035300000000000000000
3. 35710500000000000000000
4. 45526300000000000000000
5. 13489300000000000000000
6. 40889400000000000000000
7. 44863900000000000000000
8. 23425600000000000000000
9. 42394900000000000000000
10. 25172000000000000000000
Answer:
44863900000000000000000
23 POINTS PLEASE ANSWER
Question:
Amy was observing the growth of five kinds of flowering plants on a windowsill. She noticed that some of the flowers on some of the plants turned toward the sun during the day, but the flowers on other plants did not turn toward the sun. She asked the following question.
“Why do living things sometimes change direction?”
Why is Amy’s question not a very good scientific question?
Options:
It is too broad.
It is based on her opinion.
It depends on moral judgments.
It leads to a hypothesis that can be tested.
Answer:
it was too broad
Explanation:
mark me as the brainliest
ANSWER
it was too broad
For the change H2O2 --> H2O, is the oxygen oxidized, reduced, and/or neither?
Answer:
Reducing / reduced
Does anybody know this question
Please Help ASAP! Will Mark Brainliest
Answer: 35. it is 100°C
36. there is 7 periods in the periodic table
37. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen. Oil and water form a heterogeneous or cereal and milk also makes a heterogeneous. a example of solution mixture is salt and water or rubbing alcohol.
38. A two phase mixture is a mixture of two different substances. An example of a two phase mixture would be a soft drink. It is a liquid and a gas. To separate these two substances you could heat the liquid and then capture the carbon dioxide.
Explanation:
I hope this helps you out buddy stay safe
what causes the greenhouse affect?
it’s actually environmental science
Draw arrows for all of the attractive and repulsive forces between the negatively charged electrons and positively charged protons in these atoms. Make sure your arrows clearly show the difference between attractive and repulsive forces. Note that the particles without a charge label are neutral.
Answer:
Attraction
(e-) ---> <--- (H+)
Repulsion:
<---(e-) (e-)-->
Neutral:
(e-) (Helium)
Explanation:
Accordingly to coulomb's law:
In the attraction, the hydrogen without an electron has a positive charge and needs to be fulfilled with a negative charge found in an eletron.
In the repulsion, both electrons has the same charge and repulse each other.
In the neutral case, the Helium is highly stable therefore the electron is not attracted.
Which characteristic influences the polarity of these molecules?
(Molecules are; CCI4, NH3, CH4, H20, CO2) P.S WILL GIVE BRAINLIEST AND 5 STARS+ THANKYOU! :)
Answer: electronegativity,
Explanation:
Escribe la fórmula de los siguientes compuestos: Triyoduro de fosoro Carburo de silicio Tetracloruro de azufre Pentayoduro de nitrógeno Heptafluoruro de cloro Seleniuro de teluro (VI) Tribromouro de antimonio Nitruro de fósforo (III) Sulfuro arsénico
Answer:
hola, tuve que usar el traductor de google en esto. Ni siquiera sé si entenderás esto, pero vale la pena intentarlo. y la cuestión es que no tengo la respuesta a esto, pero tenía ganas de responder en español :) por favor, responda en español para que pueda responder con una respuesta en español porque ¡esto es divertido! Esta es la tercera respuesta en español que he hecho esta noche y no tengo la intención de detenerme ahora. Sin embargo, me estoy quedando sin cosas que decir. jaja
Explanation:
How do ions form?
Please
Which two formulas represent compounds?
A. Ag
B. HCI
C. H2
D. NaCl
Answer:
it is A and BExplanation:
A and b are Sodium chloride and Hydrogen chloride which are both compounds.
How many Protons, electrons, and neutrons are in Dysprosium?
EASY POINTS?
Answer:
Number of Protons - 66
Number of Neutrons - 97
Number of Electrons - 66
Explanation:
You're welcome :3
9.Magnetization of iron is a physical change.
A true
B false
Answer:
This is true.
Explanation:
Magnetization of iron is a physical change and not a chemical change as there is no change of state, no change of temperature, no smell and no evolution of gas.
I will give 25 points and make them brainlest if they solve this.
A carbon atom that is a part of your body could very well have been part of a dinosaur millions of years ago. What BEST explains this?
A The carbon atoms that are found in current living things are developed when the organism is produced.
B Carbon atoms found in current living things are the same carbon atoms that have always been a part of living things, they are just recycled.
C This could not be explained because carbon found in our bodies could not have a part of any previous organism.
D Carbon atoms are genetically passed through the evolution of organism.
Answer:
B - Carbon atoms found in current living things are the same carbon atoms that have always been a part of living things, they are just recycled.
Carbon atoms found in current living things are the same carbon atoms that have always been a part of living things, they are just recycled. Hence, option B is correct.
What is an atom?An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons.
Dinosaurs were the most dominating organism in that time period.
The dinosaurs and the present-day human beings have certain similar characteristics. Some of them are as follows-
They both have control over their body movement.They have a well-functioning brain.They are sharp and active.The dinosaurs were dominant during the Jurassic period and the humans are dominating at the present on earth.Hence, option B is correct.
Learn more about an atom here:
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Gold atoms can be identified based on the number of which subatomic particles?
A.neutrons
B.electrons
C.nuclei
D.protons
Answer:
D.protons
Explanation:
Gold is a chemical element and it is the element 79 on the periodic table. Thus, it has an atomic number of 79. The chemical symbol for Gold is Au, it is chemically classified as a transition metal and as a solid at room temperature.
Generally, the chemical element Gold is known to be malleable, ductile and a good conductor of electricity and heat. Also, it is a non-toxic chemical element with a beautiful lustrous sheen.
Gold atoms can be identified based on the number of protons (79) because it represent its atomic number, which is what is used to differentiate an atom of an element from the atom of another chemical element.
Which one is it First to answer (correct) gets brainlist
Answer:
D
Explanation:
A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. ... While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented
titsssss is the answerr mateeee
The decay of radium-226 produces an isotope
of the element radon and alpha radiation. The
atomic number of radium (Ra) is 88; the atomic
number of radon (Rn) is 86. Write a balanced
equation for this transformation.
Answer:
²²⁶₈₈Ra → ²²²₈₆Rn + ⁴₂He +⁰₀γ
Explanation:
This radioactive decay occurs when the unstable radium-226 atom wants to lose energy by emitting an alpha particle from its nucleus which is an helium nucleus with no electron. The radium (86) is transformed to radon(Rn) where the atomic number of radium (88) is reduced by two units into radon, Rn (86) and mass number reduced by 4 units.
The equation for the transformation is;
²²⁶₈₈Ra → ²²²₈₆Rn + ⁴₂He +⁰₀γ where
²²⁶₈₈Ra ---------radium-226
²²²₈₆Rn -------radon-222
⁴₂He ----------alpha particle
⁰₀γ ------------energy
Note that ⁴₂He can also be written as : ⁴₂∝
Answer:
it is alpha decay
Explanation:
im albert einstien
11. Which element forms an ionic compound when it reacts with lithium?
