Match these items.

1

.

second half of large intestine

absorption begins here

2

.

absorption

to leave the body

3

.

excretion

fourth site of digestion

4

.

villi

to take into the body

5

.

large intestine

safehouse for good bacteria

6

.

appendix

water is absorbed here

7

.

small intestine

provide surface area to absorb the nutrients in the small and large intestines

the atomic mass is the bottom number on the element.

-steel jelly

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.