Dot and cross diagrams

How many OUTER SHELL electrons does Chlorine have

• 35.5

• 7

• 17

Answer explanation

It is in group 7, so it has 7 outer electrons

Tags

NGSS.MS-PS1-1

With 7 outer electrons, how many bonds can Chlorine form?

(how many electrons does it need to have a full shell)

• 1

• 2

• 6

• 7

Answer explanation

Chlorine has one space in its outer shell so forms one bond.

Tags

NGSS.MS-PS1-1

With 1 outer electron, how many bonds can Hydrogen form?

(how many electrons does it need to have a full shell)

• 1

• 2

• 6

• 7

Answer explanation

Chlorine has one space in its outer shell so forms one bond.

Click the location of the BONDED pair of electrons, which should be represented by a dot and cross

Answer explanation

The bonded pair will always be in the 'shared area' where the circles overlap

Tags

NGSS.MS-PS1-1

Click the locations of the UNBONDED pairs of electrons, which should be represented by two dots

Cl - 7 outer electrons

H - 1 outer electron

Answer explanation

Chlorine has 7 outer electrons,

1 is shared (bonded), the other 3 pairs are unbonded.

Hydrogen has 1 outer electron,

1 is shared (bonded), it has no unbonded electrons

Tags

NGSS.MS-PS1-1

Click the locations of the UNBONDED pairs of electrons, which should be represented by two dots

Cl - 7 outer electrons

H - 1 outer electron

Answer explanation

Chlorine has 7 outer electrons,

1 is shared (bonded), the other 3 pairs are unbonded.

Hydrogen has 1 outer electron,

1 is shared (bonded), it has no unbonded electrons

Tags

NGSS.MS-PS1-1

Draw in the correct position of the electrons as dots and crosses.

Answer explanation

Tags

NGSS.MS-PS1-1

The dot and cross diagram has been started for you. Where should the bonded electrons go?

Answer explanation

The bonded electrons are always in the 'shared area' where the cirlces overlap

Tags

NGSS.MS-PS1-1

The dot and cross diagram has been started for you. Where should the UNBONDED cross 'XX' electron pairs go?

Answer explanation

The unbonded crosses belong to the Cl on the left, one pair is done for you, the other two need to be added.

Tags

NGSS.HS-PS1-2

The dot and cross diagram has been started for you. Where should the UNBONDED dot '⋅⋅' electron pairs go?

Answer explanation

The unbonded electrons dots belong to the Cl on the right. It has three unbonded pairs

Tags

NGSS.HS-PS1-2