Isotopes and Atomic Mass PhET

What happens when the number of neutrons in an atom increases?

• A) The atom becomes a different element.

• B) The atom becomes an isotope of the original element.

• C) The atomic mass decreases.

• D) The atom loses its charge.

How is the atomic mass of an isotope determined?

• A) By adding the number of protons and neutrons.

• B) By adding the number of electrons and neutrons.

• C) By adding the number of protons and electrons.

• D) By subtracting the number of protons from the number of neutrons.

What is true about isotopes of the same element?

• A) They have different numbers of protons.

• B) They have the same atomic mass.

• C) They have the same number of neutrons.

• D) They have the same number of protons but different numbers of neutrons.

What is the atomic mass of Carbon-12?

• A) 6

• B) 12

• C) 14

• D) 6.022×10^23

What happens if you change the number of protons in an atom?

• A) The atom becomes an isotope.

• B) The atom changes into a different element.

• C) The atom becomes neutral.

• D) The atomic mass changes.

Tags

NGSS.HS-PS1-8

How does the number of neutrons in an atom affect its mass?

• A) More neutrons increase the mass.

• B) More neutrons decrease the mass.

• C) Neutrons do not affect the mass.

• D) The number of neutrons does not change the atomic mass.

How many protons does an oxygen atom have?

• A) 8

• B) 16

• C) 10

• D) 14

What is the atomic mass of Oxygen-16?

• A) 8

• B) 12

• C) 16

• D) 18

What would happen to the atomic mass of chlorine if the number of neutrons increased from 18 to 20?

• A) The atomic mass would decrease.

• B) The atomic mass would increase.

• C) The atomic mass would stay the same.

• D) The atomic mass would become negative.

Which of the following is an isotope of hydrogen?

• A) Hydrogen-1

• B) Hydrogen-2

• C) Hydrogen-3

• D) All of the above