Pretest

Question 1

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

Revolt · Accepted Answer

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

Question 2

An atom of element Be has four protons, four electrons, and five neutrons. Which element could be an isotope of this atom?

Revolt · Accepted Answer

D: beryllium-10

Question 3

The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does this atom have?

Revolt · Accepted Answer

C: 28

Question 4

A scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. What particles is the scientist studying?

Revolt · Accepted Answer

D: the  He  quarks

Question 5

What is the charge on an electron?

Revolt · Accepted Answer

C: negative 1

Question 6

How are isotopes defined?

Revolt · Accepted Answer

A: forms of the same element that differ in the number of neutrons in each atom

Question 7

A lithium atom has three protons, three neutrons, and three electrons. What is the overall charge on this atom?

Revolt · Accepted Answer

A: 0

Question 8

Which two particles are found in the nucleus of an atom?

Revolt · Accepted Answer

A: protons and neutrons

Question 9

The mass number of Fe raised to the 2 plus power is 56 How many neutrons are there in a single Fe raised to the 2 plus power atom?

Revolt · Accepted Answer

A: 30

Question 10

Carbon-12 and carbon-13 are isotopes of carbon. Which statement is correct?

Revolt · Accepted Answer

D: They both have the same atomic number.

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