Atoms Molecules and Compounds

Where is most of the mass of the atom located?

• In the electrons

• In the electron cloud

• In the nucleus

• All of the answers are correct.

Tags

NGSS.MS-PS1-1

The smallest unit of an element is a(n) ______________________.

• atom

• compound

• molecule

• none of the answers are correct.

Which of the following is true about molecules? Mark all that are correct.

• Molecules can be made of only one atom.

• Molecules can be made of only one type of element

• Molecules can be made of two or more elements

• Molecules cannot be made of three elements

Tags

NGSS.MS-PS1-1

Which of the following is NOT an example of a compound?

• C6H1206

• H20

• NH4

• O2

Tags

NGSS.MS-PS1-1

Which of the following are contained in the nucleus of most atoms? Check all that are correct.

• Electrons

• Carbon

• Protons

• Neutrons

• Ribosomes

Tags

NGSS.MS-PS1-1

An ordinary atom has an equal number of protons and electrons

• True

• False

Carbon dioxide is abbreviated as CO₂ because it is made up of 1 carbon atom and 2 oxygen atoms. Carbon dioxide is a/an...

• Colloid because it has carbon in it

• Compound because it is a molecule with more than one type of atom

• Atom because it is the smallest unit of carbon dioxide that exists

• Element because carbon and oxygen are both in the periodic table of elements

Tags

NGSS.MS-PS1-1

Iron is a metal that is mined from the earth. Iron metal is used to make many different things, including buildings and soup cans. Iron is made of only 1 type of atom. Iron is a/an...

• Atomic number

• Compound

• Element

• Atomic weight

Tags

NGSS.MS-PS1-1

Atoms are made up of : 

• water

• protons neutrons and electons

• electrons and protons

• energy

Tags

NGSS.MS-PS1-1

What is an element?

• Two or more atoms joined together.

• One of over 100 types of atoms

• Two or more different elements joined together.

• A particle with no charge found in the nucleus of an atom.