Periodic Table Elements and Ions

There are 7 periods on the periodic table.

• True

• False

Which element has properties similar to Calcium (Ca)?

• Sodium

• Magnesium

• Potassium

How many protons does Potassium (K) have?

• 39

• 19

• 20

• 39.10

What is the atomic mass of Calcium (Ca)?

• 40.08

• 20

Match the following

• Atomic Number

• 8

• Element Name

• O

• Atomic Mass

• Oxygen

• Symbol

• 15.999

Tags

NGSS.MS-PS1-1

What is the Periodic mass of the 6th Element?

• 6

• C

• Carbon

• 12.011

Label the parts of the element, seen on the periodic table.

a

b

c

d

Element Name

Chemical Symbol

Atomic Number

Atomic Mass

Tags

NGSS.MS-PS1-1

The ​ (a)   is an organized array of all the chemical elements in order of increasing atomic number.

• periodic table

• atomic mass number

• law of conservation of mass

Answer explanation

The correct answer is 'periodic table'. The question refers to an organized array of all the chemical elements in order of increasing atomic number, which is the definition of the periodic table.

Calcium is in Period 4, Group 2 on the Periodic Table of elements. Calcium is a ​ (a)   .

• Metal

• Non Metal

• Metalloid

The vertical columns on the Periodic Table are called ​ (a)   . These tell us the number of ​ (b)   the element has.

• groups

• valence electrons

• periods

• energy levels