Atoms and Periodic Table practice

What is the smalled unit of matter that can be broken down and still keep its chemical makeup?

• Proton
• Neutron
• Atom
• Electron

Who developed the first atomic theory that all matter is made up of atoms that cannot be created, divided or destroyed?

• Dmtri Mendeleev
• JJ Thomson
• Niels Bohr
• John Dalton

Tags

NGSS.HS-PS1-7

Which scientist thought that atoms are solid positive sphere with electrons on the outside?

• John Dalton
• JJ Thomson
• Niels Bohr
• Ernest Rutherford

Whose student helped launch the current atomic theory?

• Ernest Rutherford
• Niels Bohr
• JJ Thomson
• John Dalton

Who discovered that atoms have a nucleus and later discovered protons in an atom?

• John Dalton
• JJ Thomson
• Niels Bohr
• Ernest Rutherford

Tags

NGSS.HS-PS1-8

Which scientist discovered that atoms had neutrons and have an elctron cloud?

• John Dalton
• JJ Thomson
• James Chadwick
• Niels Bohr

Tags

NGSS.HS-PS1-8

What are the positively charged particles of an atom called?

• Neutrons
• Protons
• Electrons
• Decepticons

What particles of the atom have no charge?

• Neutrons
• Electrons
• Atom
• Protons

If an atom has equal numbers of protons and electrons it is said to have a ________ charge.

• Negative
• Positive
• Slightly Positive
• Neutral

What is the number of protons in the nucleus of an atom called?

• Atomic Mass
• Atomic Weight
• Atomic Number
• Atomic Characteristic