Atoms, Elements, Compounds and Mixtures

True or False: All matter has mass and takes up space.

• True

• False

Tags

NGSS.MS-PS1-5

Which subatomic particles are located in the nucleus of the atom?

• proton and electron

• electron and neutron

• proton and neutron

• just protons

What subatomic particle has a positive (+) charge?

• proton

• neutron

• electron

What subatomic particle has a negative (-) charge?

• proton

• neutron

• electron

What subatomic particle has a neutral (0) or no charge?

• proton

• neutron

• electron

If one atom of Oxygen has 8 protons, how many electrons would we expect it to have?

• 4

• 8

• 16

• We do not know

C₂H₆O is the chemical formula for ethanol, a chemical in gasoline. How many CARBON atoms are in one molecule of ethanol?

• 1

• 2

• 4

• 6

Tags

NGSS.MS-PS1-1

C₂H₆O is the chemical formula for ethanol, a chemical in gasoline. How many HYDROGEN atoms are in one molecule of ethanol?

• 1

• 2

• 4

• 6

Tags

NGSS.MS-PS1-1

True or False: Electrons are found around the outside of the nucleus in the electron cloud.

• True

• False

Tags

NGSS.MS-PS1-1

A compound is...

• a pure substance that cannot be simplified or broken down into another substance

• a pure substance made of two or more elements chemically combined

• two or more substances that are mixed together but NOT chemically combined