Atoms, Elements, and Molecules - 3

Question 1

Protons

Answer 1

positive charge

number is atomic number

Question 2

Neutrons

Answer 2

no charge

number is mass-number

Question 3

Electrons

Answer 3

negative charge

number is atomic number

Question 4

Elements vs. Compounds

Answer 4

Elements are one substance, and compounds are a mix of two or more elements

Question 5

Covalent Bond

Answer 5

happens between atoms when electrons are shared

covalent C-C bonds form macromolecules

Question 6

Hydrogen Bond

Answer 6

happens between water molecules as they have more slots than filled by the hydrogen atoms so stick to other oxygen atoms from different molecules

not as strong as other bonds

Question 7

What type of molecule is water? (polar vs nonpolar)

Answer 7

Polar

unequal sharing of electrons

: oxygen side is negative charge and hydrogen is positive

Question 8

Solute + Solvent =

Answer 8

Solution

Question 9

Cohesion

Answer 9

stickiness, water attracted to water

Question 10

Adhesion

Answer 10

capillary action, water attracted to other substances

Question 11

Universal Solvent

Answer 11

Water

Question 12

Buffer

Answer 12

tries to neutralize the solution by absorbing excess H+ or OH-

in an acidic solution, it will absorb extra H+ to try to neutralize it

Question 13

ionic bond

Answer 13

when atoms give or lose an electron