The Structure of the Atom

Question 1

The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?

Revolt · Accepted Answer

30

Question 2

Which statement describes an electron?

Revolt · Accepted Answer

It has a negative charge and is located in orbitals around the nucleus.

Question 3

Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct?

Revolt · Accepted Answer

They both have the same atomic number.

Question 4

Boron occurs naturally as two isotopes. What is the difference between these isotopes?

Revolt · Accepted Answer

They have different numbers of neutrons and different mass numbers.

Question 5

The table below gives the numbers of protons, electrons, and neutrons in four atoms.AtomNumber of protonsNumber of neutronsNumber of electrons198929983991049109Based on the table, which atom has a charge of –1?

Revolt · Accepted Answer

3

Question 6

A particle that travels around the nucleus of an atom in orbitals is called a(n)

Revolt · Accepted Answer

electron.

Question 7

In which of these statements are protons, electrons, and neutrons correctly compared?

Revolt · Accepted Answer

Quarks are present in protons and neutrons but not in electrons.

Question 8

The table below gives some characteristics of element Y.Characteristics of element YValuesMass number11Number of neutrons in a single atom6Average atomic mass (grams/mole)10.81What is the identity of element Y?

Revolt · Accepted Answer

B

Question 9

The table below gives the atomic mass and relative abundance values for the three isotopes of element M.Relative abundance (%)Atomic mass (amu)78.9923.985010.0024.985811.0125.9826What is the average atomic mass (in amu) of element M?

Revolt · Accepted Answer

24.30

Question 10

An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass?

Revolt · Accepted Answer

the proton and the neutron

The Structure of the Atom Answers

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