compound

Question 1

compound?

Answer 1

A substance formed when two or more elements chemically bond together.

Question 2

John Dalton

Answer 2

theory that explains that all matter is made of atoms

Question 3

Dmitri mendeleev

Answer 3

he placed elements with similar properties together

Question 4

period

Answer 4

chart that organizes all chemical elements by their properties and atomic numbers

Question 5

noble gases

Answer 5

stable elements that do not react easily with others

Question 6

Alkali metals

Answer 6

very reactive elements in the first colum of the periodic table

Question 7

nonmetals

Answer 7

elements that lack metal properties can be gases, liquids, or solids

Question 8

group 1

Answer 8

first colum of the periodic table including relative alkali metals like lithium and sodium

Question 9

chemical reaction

Answer 9

when substances change into new ones by breaking and forming bonds

Question 10

reactants/products

Answer 10

the starting materials in a chemical reaction. products are the new substances formed from that reaction

Question 11

exothermic

Answer 11

a chemical reaction that releases energy by light or heat

Question 12

endothermic

Answer 12

any chemical reaction that absorbs heat from its environment

Question 13

activation energy

Answer 13

the minimum amount of energy that is required to activate atoms/molecules to a condition in which they undergo chemical transformation or physical transport

Question 14

catalyst

Answer 14

a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed by the reaction

Question 15

organic compound

Answer 15

a molecule that contains carbon atoms bonded to other atoms

Question 16

polymer

Answer 16

a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together

Question 17

cell theory

Answer 17

all living things are made of cells, which are the basic unit of life, and all cells come from pre-existing cells

Question 18

compound microscope

Answer 18

a type of microscope that utilizes two sets of lenses to magnify a specimen, typically used for high-resolution viewing

Question 19

virus

Answer 19

tiny infectious agent that needs a living cell (host) to replicate

Question 20

vaccine

Answer 20

prevention of disease

Question 21

chloroplast

Answer 21

tiny organelle found within plant cells that’s responsible for photosynthesis

Question 22

mitochondria

Answer 22

the “powerhouses of the cell,” responsible for producing the energy currency (ATP) that fuels cellular activities.