CH3 biological elements

Question 1

what causes different elements

Answer 1

atoms having different numbers of protons in their nucleus

Question 2

what are the most abundant chemicals in biology

Answer 2

carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus

Question 3

what is a covelant bond

Answer 3

when two atoms share a pair of electrons

Question 4

what is an ionic bond

Answer 4

the electrostatic attraction between two oppositely charged ions

Question 5

calcium ion

Answer 5

muscle contraction and nerve impulse transmission

Question 6

sodium ion

Answer 6

kidney function and nerve impulse transmission

Question 7

potassium ion

Answer 7

stomatal opening and nerve impulse transmission

Question 8

hydrogen ion

Answer 8

catalysis of reactions, ph determination

Question 9

ammonium ions

Answer 9

production of nitrate ions by bacteria

Question 10

nitrate ions

Answer 10

nitrogen supply to plants for amino acid and protein formation

Question 11

hydrogencarbonate ions

Answer 11

maintenance of blood pH

Question 12

chloride ions

Answer 12

balance positive charge of sodium and potassium ions in cells

Question 13

phosphate ions

Answer 13

cell membrane formation, atp formation, nucleic acid formation, bone formation

Question 14

hydroxide ions

Answer 14

catalysis of reactions, ph determination

Question 15

What causes a polar molecule

Answer 15

In a covelant bond, electrons are not always shared equally. The atom with the greater share is slightly negative and the other slightly positive.

Question 16

What is a hydrogen bond

Answer 16

The interaction of polar molecules due to the attraction of positive and negative regions

Question 17

Characteristics of a hydrogen bond

Answer 17

• weak
• high in numbers
• constantly form and reform