Modern Periodic Table

What is the atomic number of carbon?

• 8

• 12

• 6

• 3

What is the atomic mass of oxygen?

• 15.999 u

• 12.011 u

• 16.999 u

• 14.999 u

How many periods are there in the modern periodic table?

• There are 5 periods in the modern periodic table.

• There are 3 periods in the modern periodic table.

• There are 7 periods in the modern periodic table.

• There are 10 periods in the modern periodic table.

How many groups are there in the modern periodic table?

• There are 25 groups in the modern periodic table.

• There are 18 groups in the modern periodic table.

• There are 10 groups in the modern periodic table.

• There are 5 groups in the modern periodic table.

What is the trend in atomic size as you move from left to right across a period in the periodic table?

• The atomic size increases

• The atomic size decreases

• The atomic size remains constant

• The atomic size becomes unpredictable

What is the trend in electronegativity as you move from top to bottom within a group in the periodic table?

• Electronegativity increases

• Electronegativity decreases

• Electronegativity remains constant

• Electronegativity fluctuates

What is the electronic configuration of sodium?

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s3

• 1s2 2s2 2p6 3s3 3p1

What is the name of the scientist who proposed the law of octaves in the early periodic table?

• Marie Curie

• Michael Faraday

• Isaac Newton

• John Newlands

What is the maximum number of electrons that can be accommodated in the third energy level of an atom?

• 10

• 18

• 7

• 25

What is the name of the first period in the modern periodic table?

• The initial period

• The primary period

• The opening period

• The name of the first period in the modern periodic table is the '1st period'.