The sum of the numbers of protons and neutrons in a nucleus of an atom answer

1 answer:

6 0

An atom's mass number is the sum of the numbers of protons and neutrons in its nucleus. The atomic weight is the average mass of all of the isotopes of that element.

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What is the number of atoms per unit cell for each metal? (c) Silver, Ag

katrin2010 [14]

Silver (Ag) is the number of atoms per unit cell for each metal. Silver has a face-centred cubic (FCC) unit cell structure, where there are 8 corner atoms and 6 atoms on the faces, so there are a total of 4 atoms per unit cell.

The identical unit cells are defined in such a way that they take up space without touching one another. A crystal's internal 3D arrangement of atoms, molecules, or ions is known as its lattice. It consists of a large number of unit cells. Every point of the lattice is occupied by one of the three component particles.

Primitive cubic, body-centred cubic (BCC), and face-centred cubic are the three types of unit cells (FCC). The three different sorts of unit cells will be thoroughly covered in this section.

To learn more about the unit cell refer here:

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1 year ago

We can see water change state, from ice to steam. This is a __________ change in matter. A) chemical B) combustion Eliminate C)

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Answer: Option (C) is the correct answer.

Explanation:

When chemical composition of a substance is not changing in a chemical reaction then it is known as a physical change.

For example, when water change state, from ice to steam then it means solid state is changing into gaseous state.

Therefore, it is a physical change.

And, a reaction which causes change in chemical composition is known as a chemical change.

For example, $Li + Cl \rightarrow LiCl$

Thus, we can conclude that we can see water change state, from ice to steam. This is a physical change in matter.

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Physicist Ernest Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.

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