Atom Review

Which of the following would be isotopes of each other?

• A and D

• B and C

• C and D

• A and B

Tags

NGSS.MS-PS1-1

Which of the following is true regarding electrons?

• They are larger than protons and have a charge of -1

• They are smaller than protons and have a charge of -1

• They are larger than protons and have a charge of +1

• They are smaller than protons and have a charge of +1

Tags

NGSS.MS-PS2-3

The radioactive decay of a particular substance is shown in the graph to the left. What is the half life of this isotope?

• 5 days

• 10 days

• 15 days`

• 20 days

Tags

NGSS.HS-PS1-8

Element X has 3 stable isotopes. X-95 (22% abundant), X-96 (75% abundant), and X-98 (3% abundant). When calculating the average atomic mass, which number would you expect the atomic mass to be closest to?

• 95

• 96

• 97

• 98

Silicon has a mass number of 28 and an atomic number of 14. How many protons does it have?

• 28

• 14

• 42

• 7

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons does sulfur have? It's atomic number is 16 and it's atomic mass is 32.

• 16 protons, 16 neutrons, and 16 electrons

• 16 protons, 32 neutrons, and 16 electrons

• 16 protons, 16 neutrons, and 32 electrons

• 32 protons, 16 neutrons, and 16 electrons.

Tags

NGSS.MS-PS1-1

What is the mass number of the element nitrogen? It has 7 protons, 7 neutrons, and 7 electrons.

• 7

• 14

• 21

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons are in a neutral atom of Chlorine-37?

• 18, 37, 18

• 17,35,18

• 17, 20, 17

• 17,18,18

Tags

NGSS.MS-PS1-1

A particular atom contains 10 protons, 10 electrons, and 13 neutrons. What is the mass number? What is the element?

• 23; sodium

• 20; sodium

• 10; boron

• 12; magnesium

Tags

NGSS.MS-PS1-1

Uranium-235 is a radioactive isotope with a half life of 704 million years. How much of a 500.0 gram sample will remain after 2,816 million years?

• 0.7102 grams

• 4.000 grams

• 125.0 grams

• 31.25 grams

Tags

NGSS.HS-PS1-8