3.1 Classification of Elements

Atoms of elements in group 1 have ____________.

• one electron in their outermost energy level

• two electrons in their outermost energy level

• seven electrons in their outermost energy level

• eight electrons in their outermost energy level

Tags

NGSS.HS-PS1-1

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

Tags

NGSS.HS-PS1-1

The atoms of elements belonging to the same group of periodic table have the same

• number of protons.

• number of electrons.

• number of neutrons.

• number of electrons in the outermost shell.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the modern periodic table, the period indicates the value of:

• Atomic number

• Atomic mass

• Principal quantum number

• Azimuthal quantum number.

The elements which occupy the middle block (d) in the periodic table are called ................ elements.

• transition

• alkali

• alkaline earth

• noble

In the periodic table, the elements which are similar in their Chemical & physical properties are located in the same ................

• period

• group

• nucleus

• energy level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Choose which of the following position is correct for Neon (z = 10)

• Period : 2

  Group : 17

  p-block

• Period : 2

  Group : 18

  s-block

• Period : 2

  Group : 18

  p-block

In the modern periodic table no of groups is

• 18

• 7

• 67

• 118

The transition elements start to appear from the beginning of the ................. period.

• second

• third

• forth

• fifth

S has the electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁴ choose the correct position of S element in periodic table

• Group 6

  Period 3

  p-block

• Group 16

  Period 3

  s-block

• Group 16

  Period 3

  p-block