An atom of the element Bromine has an atomic number of 35 and a mass number of 80. How many protons does an uncharged Bromine atom have?

• 45

• 40

• 115

• 35

What is the atomic number of this element?

• 65

• 30

• 95

• 35

Tags

NGSS.HS-PS1-1

The elements in group 1 of the periodic table are all called alkali metals. All alkali metals have the same

• atomic number

• atomic mass

• number of ions

• number of valence electrons

In which period and group would you find this atom?

• Period 2, Group 14

• Period 4, Group 2

• Period 6, Group 55

• Period 1, Group 14

Tags

NGSS.MS-PS1-1

How many energy levels does Cesium have?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

Which of the following could be the chemical symbol representing the element Bromine?

• B

• Br

• Be

• Bo

How many valence electrons does Magnesium have?

• 12

• 8

• 2

• 3

Tags

NGSS.HS-PS1-1

How many electrons does this element have?

• 56

• 26

• 82

• 30

Tags

NGSS.HS-PS1-1

How many neutrons does this element have?

• 11

• 12

• 33

• 34

Tags

NGSS.MS-PS1-1

How do you calculate the number of neutrons in an element?

• Add the Atomic Number and the Atomic Mass

• Subtract the Atomic Number from the Atomic Mass

• Multiply the Atomic Mass by the Atomic Number

• Divide the Atomic Mass by the Atomic Number