Test Review – History of the Atom & Atomic Structure

Atoms of the same element but with different #s of neutrons are called ___

• isotopes

• ions

• molecules

• allotropes

Tags

NGSS.HS-PS1-8

NGSS.HS-PS1-4

If there is an element with 3 protons, 3 electrons, and 4 neutrons, what is its name?

• Lithium

• Beryllium

• Helium

• Hydrogen

Tags

NGSS.MS-PS1-1

In a neutral atom, the # of protons = the # of ____________.

• electrons

• neutrons

• isotopes

• nuclei

What does the atomic number tell you about that atom?

• The number of protons in the atom.

• The number of neutrons in the atom.

• The atomic number tells you the atomic mass of the atom.

What is an isotope?

• Atoms of the same element with different numbers of neutrons.

• Atoms of different elements with the same number of neutrons.

• Atoms of the same element with the same number of neutrons.

• Atoms of different elements with different numbers of protons.

What is the difference between carbon-12, carbon-13, & carbon-14?

• They have different numbers of neutrons (and thus different mass numbers).

• They have different numbers of protons.

• They have different numbers of electrons in their outer shell.

• They are different elements entirely.

Tags

NGSS.HS-PS1-8

Which scientist coined the term atom or atomos?

• Democritus

• Aristotle

• Dalton

• Rutherford

Which scientist discovered the electron and developed the “plum pudding” model?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• James Chadwick

Which scientist identified the nucleus in the atom?

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

• James Chadwick

Tags

NGSS.HS-PS1-8

Which scientist said the electrons go around the nucleus in distinct orbits or circular paths?

• Niels Bohr

• Albert Einstein

• Ernest Rutherford

• James Chadwick