Atoms, Molecules, and Elements

Which subatomic particle is located in the nucleus?

• electron

• proton

• neutron

• ion

What is the charge of a proton?

• Positive

• Negative

• Neutral

• Variable

What is the smallest unit of an element?

• atom

• molecule

• compound

• particle

Which of the following is NOT a compound?

• Water (H2O)

• Oxygen (O2)

• Sodium Chloride (NaCl)

• Carbon Dioxide (CO2)

Tags

NGSS.MS-PS1-1

Which group in the periodic table contains noble gases?

• group 1

• group 2

• group 17

• group 18

How are elements arranged in the periodic table?

• Alphabetically

• By atomic mass

• By atomic number

• By chemical reactivity

Which of the following is an example of a physical change?

• a) Burning wood

• b) Digesting food

• c) Melting ice

• d) Rusting iron

Which element has the atomic number 6?

• a) Oxygen (O)

• b) Carbon (C)

• c) Nitrogen (N)

• d) Hydrogen (H)

Which of the following is an example of a physical change?

• a) Burning wood

• b) Digesting food

• c) Melting ice

• d) Rusting iron

Tags

NGSS.MS-PS1-4

What is the charge of an electron?

• positive

• negative

• neutral

• variable

Tags

NGSS.MS-PS2-3