Earth Science Unit 3 Review

How many Protons does the Elements Iodine contain?

• 74

• 21

• 53

• 100

How many Neutrons does atom of oxygen contain?

• 16

• 8

• 24

• 4

Where are protons found in the atom?

• electron cloud

• nucleus

• mitochondria

• neutron

A substance that can NOT be broken down into any other substance chemically or physically is---

• compound

• element

• solution

• mixture

What is the atomic weight of calcium?

• 20

• 40.078

• 60.078

• 800.98

The periodic table is arranged ---

• by symbol

• by the number of neutrons

• by the atomic number

• in alphabetical order

Two or more elements chemically combine together to form---

• element

• mixture

• compound

• solution

Tags

NGSS.MS-PS1-5

which example is a compound?

• He

• OH

• Ar

• Ne

Tags

NGSS.MS-PS1-1

Which example correctly identifies the number of atoms of each element in the compound H2SO4?

• Hydrogen= 1

  Sulfur=2

  Oxygen=3

• Hydrogen= 2

  Sulfur=1

  Oxygen=4

• Hydrogen= 3

  Sulfur=2

  Oxygen=1

• Hydrogen= 2

  Sulfur=2

  Oxygen=4

Tags

NGSS.MS-PS1-1

How many atoms of oxygen are found in H2O2?

• 3

• 0

• 1

• 2

Tags

NGSS.MS-PS1-1