Atomic Structure practice

Which scientist came up with the Law of Multiple Proportions?

• Dalton

• Thomson

• Bohr

• Democritus

Which scientist discovered a cathode ray was composed of tiny negatively charged particles?

• Bohr

• Dalton

• Proust

• Thomson

Rutherford's gold foil experiment led to the discovery of the _________.

• electron

• proton

• nucleus

• neutron

Tags

NGSS.HS-PS1-8

Protons are found inside the nucleus with a ____________ charge.

• positive

• negative

• neutral

The particle found outside the nucleus with a negative charge is the _________.

• proton

• neutron

• electron

Which atom has an atomic number of 55?

Tags

NGSS.HS-PS1-1

What is the atomic mass of Boron(B)?

What is the mass number of the following?

⁷³ Ge

³²

What is the mass number of the following?

Tin-119

What is the mass number of an atom that has 30 protons and 34 neutrons?

• 65.39

• 64

• 30

• 34

Tags

NGSS.MS-PS1-1