Chemistry High School

When calculating the empirical formula the mole ratio is given as follows: H₁O_3.5 What will the EF be?

• H₁O_3.5

• HO_3.5

• HO₄

• H₂O₇

Tags

NGSS.MS-PS1-5

The atomic number of an element that has 6 protons and 8 neutrons is ___.

• 6

• 2

• 8

• 14

Tags

NGSS.MS-PS1-1

What distinguishes each element from all others, and gives its identity?

• The number of protons

• The number of neutrons

• The electron configuration

• The element's universal origin

Tags

NGSS.HS-PS1-1

Fluorine is atomic number 9, and has a mass of 19. How many electrons would it have?

• 9

• 6

• 19

• 10

• F

• G

• H

• J

Tags

NGSS.MS-PS1-1

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

How many valence electrons in the model?

• 7

• 8

• 9

• 10

Tags

NGSS.MS-PS1-1

How many valence electrons are found in atoms of group 16?

• 4

• 6

• 2

• 3

• A

• B

• C

• D

• F

• G

• H

• J

Tags

NGSS.MS-PS1-1