Atoms, Elements, and Molecules

All matter is made of:

• energy

• atoms

• electrons

• compounds

What kind of charge does a Proton have?

• Neutral

• Positive

• Negative

• Bazinga

Protons and neutrons are found grouped together in the:__________.

• Electron cloud

• Charge

• periodic table

• nucleus

How many total ATOMS are in: 3AgK₂

• 5

• 3

• 6

• 9

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

What charge do electrons have?

• negative

• positive

• neutral

Which is the best definition of an atom?

• A sample that can only be found in the solid phase of matter

• The smallest unit of an element that maintains its properties.

• A substance that can be broken down into simpler substances.

• Any sample that has definite chemical and physical properties.

Which statement about the atomic nucleus is most correct?

• The nucleus is made of protons and neutrons and has a negative charge.

• The nucleus is made of protons and neutrons and has a positive charge.

• The nucleus is made of electrons and has a positive charge.

• The nucleus is made of electrons and has a negative charge.

Atoms that are neutral are said to have no electric charge because they:

• have an equal number of charged and non-charged particles.

• have neutrons in their nuclei.

• have an equal number of electrons and protons.

• have an equal number of neutrons and protons.

Which atomic particles have approximately the same mass or the same size?

• protons and neutrons

• protons and electrons

• neutrons and electrons

• proton, neutron and electron