keywords

Question 1

A plan of inquiry that uses science process skills as tools to gather, organize, analyze, and communicate information.

Answer 1

Scientific method

Question 2

parts of an atom and arrangement

Answer 2

Protons and neutrons in the nucleus and electrons orbit the nucleus.

Question 3

gain/lose electrons

Answer 3

Atoms gain and lose electrons to create bonds with other atoms.

Question 4

compare subatomic particles

Answer 4

Proton: a subatomic particle with a positive charge that is located in the nucleus of an atom
Electron: a subatomic particle with a negative charge that orbits the nucleus.
Neutrons: a subatomic particle with no charge that is located in the nucleus of an atom.

Question 5

atom vs. element

Answer 5

A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom.

Question 6

atomic number

Answer 6

Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus

Question 7

types of bonds

Answer 7

Ionic: Typically between a metal and a nonmetal - electrons are transferred from one atom to another, holding them together.
Covalent: Typically between a nonmetal and a nonmetal - electrons are shared between atoms, holding them together-usually creating a stronger bond than Ionic.

Question 8

Mixtures

Answer 8

a combination of substances that can be physically separated from one another

Question 9

Pure Substance

Answer 9

a material with a particular chemical makeup

Question 10

any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.

Answer 10

Alkali Metals

Question 11

any of the divalent strongly basic metals of group II of the periodic table comprising beryllium, magnesium, calcium, strontium, barium, and radium.

Answer 11

Alkaline earth metals

Question 12

any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.

Answer 12

Noble gases

Question 13

any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen, from which simple salts can be made.

Answer 13

halogens

Question 14

Effect caused by light being dispersed by particles in a suspension or colloids.

Answer 14

Tyndall effect

Question 15

Diffusion

Answer 15

dispersion of substances in a gas or liquid