Biochemistry

Question 1

What happens to electrons in ionic bonds?

Answer 1

they are transferred

Question 2

What happens to electrons in covalent bonds?

Answer 2

they are shared

Question 3

What types of bonds do metals and non-metals form?

Answer 3

ionic

Question 4

What types of bonds do 2 non-metals form?

Answer 4

covalent

Question 5

What is electronegativity in atoms?

Answer 5

Refers to how much an atom wants to ATTRACT an electron.

Question 6

The higher the electronegativity value, the _______ that atom attracts electrons (MORE/LESS)

Answer 6

More

Question 7

In a non-polar covalent bond, the electronegativity difference is between _____ and _____

Answer 7

0 and 0.4

Question 8

In a polar covalent bond, the electronegativity difference is between ____ and _____

Answer 8

0.5 and 1.9

Question 9

In an ionic bond, the electronegativity difference is between ____ and _____

Answer 9

2.0 and 4.0

Question 10

A non-polar covalent bond has an _____ share of electrons (EQUAL/UNEQUAL)

Answer 10

Equal

Question 11

A polar covalent bond has an ______ share of electrons (EQUAL/UNEQUAL)

Answer 11

Unequal

Question 12

What does this symbol mean? δ+

Answer 12

Partially positive (less electronegative)

Question 13

What does this symbol mean? δ−

Answer 13

Partially negative (more electronegative)

Question 14

Polar Molecules require which 2 things to be true?

Answer 14

The molecule must contain polar bonds. It will be an asymmetric molecule

Question 15

Non-polar molecules will be __________? (SYMMETRICAL/ASYMMETRICAL)

Answer 15

Symmetrical

Question 16

What does this symbol represent?

Answer 16

Bipole

Question 17

Water is a ____ molecule (POLAR/NON-POLAR)

Answer 17

Polar

Question 18

What types of bonds are formed between water molecules?

Answer 18

Hydrogen bonds

Question 19

In our bodies, water acts as a ______ (SOLVENT/SOLUTE)

Answer 19

Solvent - it dissolves other polar molecules easily like salt NaCl, Non-polar substances, like fats, do not dissolve in water

Question 20

What is ADHESION in water molecules

Answer 20

When the water molecules stick to other substances

Question 21

What is COHESION in water molecules

Answer 21

When water sticks to other water molecules

Question 22

How does water help our bodies?

Answer 22

Dissolves polar solutes (like salt)

Lubricates your joints

Good temperature regulator (absorbs heat without changing to a gas)