Question 1

What is an isotope?

Accepted Answer

an atom of an element with different numbers of neutrons

Answer

an atom of an element with different numbers of protons

Answer

an atom of an element with different atomic numbers

Answer

an atom of an element with different numbers of electrons

Question 2

What is the mass number of an atom equal to?

Accepted Answer

protons plus neutrons

Answer

atomic number plus electrons

Answer

atomic number minus protons

Answer

electrons plus neutrons

Question 3

An isotope of hydrogen having a mass number of 3 contains ? protons, ? neutrons.

Accepted Answer

1 proton,  2 neutrons

Answer

0 protons, 3 neturons

Answer

2  protons, 1 neutrons

Answer

3 protons,  0 neutrons

Question 4

Chlorine 34 is an isotope of chlorine. In what group is chlorine found?

Accepted Answer

group 17, halogens

Answer

group 18, noble gases

Answer

group 1, alkali metals

Answer

group 2, alkaline earth

Related quizzes