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Rashid [163]
3 years ago
7

I need help with this

Chemistry
2 answers:
ipn [44]3 years ago
6 0
Can’t see it properly:(
satela [25.4K]3 years ago
4 0
Can you show it again I can barely see it
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What’s the star made up of challenge?
Crank

Answer:

Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.

4 0
3 years ago
Which is true of a molecule?
rusak2 [61]

Answer:

All molecules of a compound have the same properties. The chemical properties of any individual compound would not change. The molecule is one of the smallest particles in any element that has the chemical properties of that element. Molecules are made of atoms.

4 0
4 years ago
The procese of material going through a change of state from a gas to s liquid is called______.
taurus [48]
C: condensation
Examples are glasses fogging up and water droplets on a can of soda when it’s hot
6 0
3 years ago
Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for
mel-nik [20]

Answer:

See explanation

Explanation:

The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.

Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.

The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.

Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five  black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.

Four blue foam balls hanging from strings will represent the electrons around the nucleus.

Any model that corresponds to the description above is the correct answer.

7 0
3 years ago
NaCl is formed by a covalent bond.<br> True<br> False
andreev551 [17]
False. That would be an Ionic Bond.
6 0
3 years ago
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