Whose theory says that matter is made up of tiny particles that cannot be divided?

• Aristotle
• John Dalton
• Mendeleev
• Democritus

Tags

NGSS.MS-PS1-1

Who said that matter is not made up of tiny particles?

• Aristotle
• Democritus
• Mendeleev
• Bohr

Who developed the atomic theory that says matter is made up of tiny particles called atoms?

• Aristotle
• Democritus
• John Dalton
• Bohr

What do you call the middle of an atom?

• proton
• neutron
• electron
• nucleus

Tags

NGSS.MS-PS1-1

What do you call a subatomic particle that has a negative charge?

• proton
• neutron
• electron
• nucleus

What kind of charge does a neutron have?

• positive
• negative
• neutral
• changing

What do you call the positively charged subatomic particle that is found inside the nucleus?

• proton
• neutron
• electron
• atom

What can be found inside the nucleus of an atom?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• just electrons

Tags

NGSS.MS-PS1-1

When two or more atoms share electrons, what do you call the joined atoms?

• element
• compound
• molecule
• atom

Tags

NGSS.MS-PS1-1

What do you call the smallest unit of an element with all the properties of that element?

• proton
• electron
• atom
• molecule