What orbits the nucleus of an atom?

Answers

Answer 1

Answer: Electrons orbit the nucleus of an atom. They are very small, in fact they are 1/2000 of an amu. Electrons are negative while the inside of an atom includes the positive protons and neutral neutrons. :D

Answer 2

Answer: Electrons. They are found in the orbitals outside the nucleus.

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An atom in the ground state contains 8 valence electrons this atom is classified as a

Answers

Noble Gas. Metals have 1 or 2 Valence Electrons. Halogens have 7 Valence Electrons. Semi-Metals can have different amounts.

Answer:

Noble gas

Explanation:

With the exception of helium, all elements in Group 18 contain 8 electrons in the outermost shell; these are the noble gases.

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The unstable arrangement of atoms that forms momentarily at the peak of the activation-energy barrier is known as the what?

Answers

The unstable arrangement of atoms that forms at the peak of the activation energy is called the transition state. If I remember correctly It is the point in which all the atoms or molecules (involved in the reaction) collide in the correct orientation to brake the bonds of the reactants and form the bonds in the products.

I hope this helps. Let me know if anything is unclear.

Answer:

activated complex.

Explanation:

What is the correct formula for calculating pH?

Answers

PH = - log [ H⁺ ] for POH = - log [ OH⁻]

hope this helps!

When nickel combines with fluorine to form nickel (III) fluoride, the charge of the nickel ion isa. Ni1+.
c. Ni3+.
b. Ni2+.
d. Ni4+.

Answers

the answer is c because when you take a nickel and fluorine you get Ni3+

Answer:

Explanation:

How many atoms are there in 90.2 grams of selenium?

Answers

First calculate the moles of selenium by multiplying the mass x molar mass
90.2 × 78.96 = 7122.2 moles

Number of moles multiplied by avogadros number gives number of atoms
7122.2 × 6.022 × 10^{23} = 4.289×10^{27} atoms

Which of these is a physical property?A) ability to burn a piece of paper

B) pure sodium reacts violently with water

C) the boiling point of water is 100’C

D) helium does not tend to react with anything

Answers

Hey

I think the answer is c) the boiling point of water is 100’c

I hope this helped xxx

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Number of electrons in the outer ring of bromine

What type of bond is formed between cobalt and sulfur? (covalent or ionic?)

The chemical formula for emerald is Be3Al2(SiO3)6. An emerald can be described asa pure substance because it is a compound. a pure substance because it is an element. an impure substance because it is chemically combined. an impure substance because it is a mixture.