Atomic Structure Review

Emma is reading a science textbook and comes across the abbreviation 'amu'. What does amu stand for?

• atomic mass units

• atomic mass united

• average mass units

• atomic magnitude units

Henry is studying different samples of oxygen in his science class. He learns that some oxygen atoms have different masses, but they all have the same atomic number. Which of the following statements about these oxygen atoms is NOT true?

• They have different masses

• They are found in nature

• They are rounded to whole numbers

• They have different atomic numbers

Samuel is looking at the atomic masses on the periodic table and notices that most of them have decimals. The reason for this is because

• They are not naturally occurring

• They are a weighted average of isotopes

• They are synthetic

• They are “exclusive”

• 10

• 13

• 14

• 16

Tags

NGSS.MS-PS1-1

• 0

• 1

• 2

• 3

• 14

• 15

• 16

• 18

• 13

• 14

• 25

• 26

• neutrons, protons

• electron, protons

• protons, electrons

• electrons, neutrons

• neutrons, protons

• electron, protons

• protons, electrons

• electrons, neutrons

• 33

• 34

• 35

• 36