Periodic Table 8th grade

Mendeleev arranged the periodic table by

• decreasing electrons

• increasing atomic number

• increasing neutrons

• decreasing atomic mass

The vertical columns on the periodic table are called

• Actinide series

• transitional metals

• periods

• groups or families

The horizontal rows on the periodic table are called

• periods

• transitional metals

• Actinide series

• groups or families

Which number is the atomic mass of Argon?

• 18

• 40

• 40 - 18 = 22

• 40 + 18 = 58

Tags

NGSS.MS-PS1-1

How many protons does Bromine have?

• 167

• 80 - 35 = 45

• 35

• 80

Tags

NGSS.MS-PS1-1

How many electrons does Boron have?

• 5

• 11

• 11 + 5 = 16

• 42

Tags

NGSS.MS-PS1-1

How many valence electrons does Carbon have?

• 1

• 3

• 4

• 8

Tags

NGSS.MS-PS1-1

What element can be found at group 14 period 5?

• Kr - Krypton

• Si - Silicon

• Cs - Cesium

• Sn - Tin

Is Ca (Calcium) a metal, nonmetal or metalloid?

• metal

• nonmetal

• metalloid

• megalloid

Look at the element in Group 2, Period 7. Does this element have properties of both metals and nonmetals?

• No it's a metal

• Yes it's a metalloid

• No it's a non metal

• Yes it's a non metal