Chemisty 2/5/13

Question 1

Atom

Answer 1

A basic unit of matter

Question 2

Nucleus

Answer 2

The center of the atom which contains the protons and neutrons in cells. Large structure inside some cells that contains the cell’s genetics.

Question 3

Electron

Answer 3

Negatively charged particle ; located outside the atomic nucleus

Question 4

Element

Answer 4

Substance consisting entirely of one type of atom.

Question 5

Isotope

Answer 5

Atoms of an element that has a number of neutrons different from that of other atoms.

Question 6

Compound.

Answer 6

Substance formed by the chemical combination of 2 or more elements in definite proportion.

Question 7

Ionic bounds

Answer 7

Bonds formed when one or more electrons are transferred from one atom to another.

Question 8

Ion

Answer 8

Atom that has a positive pr negative charge.

Question 9

Cohesion

Answer 9

Attraction between molecules of the same substance

Question 10

Adhesion

Answer 10

Attraction between molecules of different substance

Question 11

Mixture

Answer 11

Material composed of 2 or more elements or compounds that are physically mixed together but not chemically.

Question 12

Solution

Answer 12

Mixture of 2 or more substances on which the molecules of the substances are evenly distributed.

Question 13

Solute

Answer 13

Substances that is dissolved in a solvent to make a solution

Question 14

Solvent

Answer 14

Substances in which a solute is dissolved to form a solution

Question 15

Suspension

Answer 15

Mixture of water and non-dissolved materials.

Question 16

pH scale

Answer 16

Measurement system used to indicate the concentration of hydrogen ions H+ solution

Question 17

Monomers

Answer 17

Small unit that can join together with other small unit to form polymers

Question 18

Polymer

Answer 18

Large compound formed from combination of many monomers

Question 19

Carbohydrates

Answer 19

Compound made of carbon, hydrogen, and oxygen atoms ; major source of energy for the human body.

Question 20

Monosaccharide

Answer 20

Single sugar molecules

Question 21

Polysaccharides

Answer 21

Large macromolecules formed from monosaccharide

Question 22

Lipids

Answer 22

Macromolecules made mainly from carbon and hydrogen atoms ; including fat,oil, and waxes

Question 23

Nucleic acids

Answer 23

Macromolecules containing hydrogen and oxygen

Question 24

Nucleotide

Answer 24

Monomer of nucleic acids made up of a 5 carbon sugar, a phosphate group, and a nitrogenous base

Question 25

Ribonucleic acid (RNA)

Answer 25

Single stranded nucleic acid that contains the sugar ribose

Question 26

Deoxyribonucleic acid (DNA)

Answer 26

Nucleic acid that contains the sugar deoxyribose.

Question 27

Protein

Answer 27

Macromolecules that contain carbon, hydrogen , oxygen, and nitrogen ; needed by the body for the growth and repair and to male up enzymes

Question 28

Amino acid

Answer 28

Compound with an amino group (-NH2) on one end and a carboxyl group (-COOH) on the other end.

Question 29

Chemical reaction

Answer 29

A progress that changes one set of chemicals into another set of chemicals.

Question 30

Reactant

Answer 30

The elements or compounds that enter into a chemical.

Question 31

Product

Answer 31

The elements or compounds produce by a chemical reaction

Question 32

Activation energy

Answer 32

The energy that is needed to get a reaction

Question 33

Catalyst

Answer 33

A substance that speeds up the rate of a chemical reaction

Question 34

Enzyme

Answer 34

Proteins that speed up chemical reaction.

Question 35

Substance

Answer 35

Reactants of enzyme catalyzed reaction.