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Flashcards in keywords Deck (15)
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1

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

Scientific method

2

parts of an atom and arrangement

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

3

gain/lose electrons

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

4

compare subatomic particles

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.

5

atom vs. element

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.

6

atomic number

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

7

types of bonds

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.

8

Mixtures

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

9

Pure Substance

a material with a particular chemical makeup

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.

Alkali Metals

11

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

Alkaline earth metals

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.

Noble gases

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.

halogens

14

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

Tyndall effect

15

Diffusion

dispersion of substances in a gas or liquid