Atoms and Elements

How many atoms are in this chemical formula: (NH₄)₂SO₄

• 12

• 15

• 4

• 10

Tags

NGSS.MS-PS1-1

How many atoms are in this formula: Zn(NO₃)₂

• 3

• 5

• 9

• 7

Tags

NGSS.MS-PS1-1

How many elements are in this chemical formula: Zn(NO₃)₂

• 3

• 7

• 5

• 12

Tags

NGSS.MS-PS1-1

How many Elements are in the compound C₂H₈O ?

• 2

• 1

• 3

• 0

Tags

NGSS.MS-PS1-1

John Dalton stated:

• elements are made of atoms

• atoms of a given element are identical

• atoms cannot be subdivided, created, nor destroyed

• all of the above

Tags

NGSS.HS-PS1-7

The nucleus of an atom can be described as:

• spacious and negatively charged

• dense and positively charged

• spacious and positively charged

• dense and negatively charged

Tags

NGSS.HS-PS1-8

JJ Thomson discovered what subatomic particle

• nucleus

• neutron

• proton

• electron

Rutherford discovered what part of the atom

• nucleus

• neutron

• proton

• electron

Who proposed the theory that atoms orbit the nucleus in specific orbits.

• Bohr

• Democritus

• Rutherford

• Chadwick

This particle balances the charges from the protons to make the atom neutral

• proton

• electron

• neutron

• nucleus