Introduction to the periodic table

The first person credited with organizing the periodic table using atomic mass is

• Democritus

• Mendeleev

• John Dalton

• JJ Thomson

Elements on the left side of the periodic table are called

• metals

• nonmetals

• metalloids

• lanthanides

What is the atomic number for the NEUTRAL atom pictured?

• 7

• 8

• 14

• 16

Tags

NGSS.MS-PS1-1

What is the mass number of an atom that has 9 protons, 10 neutrons and 9 electrons?

• 9

• 10

• 28

• 19

Tags

NGSS.MS-PS1-1

How many neutrons does an atom have if it has a mass number of 9 and an atomic number of 4?

• 9

• 4

• 13

• 5

Tags

NGSS.MS-PS1-1

What element can be found at group 9, period 4?

• Beryllium

• Fluorine

• Rhodium

• Cobalt

What is the group/family name for Bromine?

• Nonmetal

• Fluorine

• Halogen

• Other nonmetal

Elements in the same horizontal row have the same __

• structure

• energy levels

• properties

• atomic mass

Malleable means

• able to bend

• able to be made into wire

• able to burn easily

• able to be pressed or hammered into a sheet

What is the symbol for lead?

• Le

• L

• Sb

• Pb