Modern Periodic Table : Trends | Periodic Classification of Elements | Assessment | English | Grade 10

In modern periodic table, what happens to the metallic character of the elements on moving from left to right?

• Metallic character decreases

• Metallic character increases

• Remains unchanged

• First decrease then increase

Answer explanation

Metallic character decreases along the period.

How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?

• Decreases

• Increases

• Remains same

• None of these

Answer explanation

The tendency to gain electrons increases on moving from left to right in a period of the periodic table.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What property do all elements in the same column of the periodic table as boron have in common?

• Have same symbols

• Have same atomic number

• Have same atomic mass

• Have 3 valence electrons

Answer explanation

All elements in the same column of the periodic table as boron have 3 valence electrons.

Number of valence electrons in the atoms of first element in a period is ________________.

• 1

• 2

• 3

• 4

Answer explanation

The number of valence electrons in the atoms of first element in a period is 1.

Usual number of valence electrons in the atoms of the last element in a period is ___________.

• 1

• 2

• 4

• 8

Answer explanation

The usual number of valence electrons in the atoms of the last element in a period are 8.