Duplicate of Science 6 Review - Atoms & Molecules

forms hydroxide ions when dissolved in water

usually composed of a metal and a nonmetal

element name

can burn; can be corrosive

number of protons + number of neutrons

vertical columns on the periodic table

process of joining different types of atoms to form a different substance

positively and negatively charged ions attract each other to form

lemons, vinegar, tomato juice

changes colors of an indicator

sour taste

The number of atoms of carbon in H₂CO₃

used to determine the concentration of acids or bases in a solution

developed a simplified model of an atom based on the idea that electrons move in shells

abbreviations for the names of elements

tiniest recognizable part of an element

identifies the number of electrons in the outer shell

helps digest food in the stomach

21

reaction in which one element replaces another

center part of an atom (21)

Atoms share electrons

chemical symbol

part of the atom with a positive charge

part of the atom with a negative charge

the study of matter -- what it's made of, it's characteristics, how it reacts to other matter

baking soda, soap, bleach

substance that contains only one kinds of atom

19

forms hydrogen ions when dissolved in water

The number of atoms of hydrogen in H₂CO₃

reaction in which a compound is broken down into simpler compounds

Atomic Mass

changes color when exposed to acid or base solutions

purpose of the periodic table of elements

reaction in which molecules combine to form a new substance

bases that dissolve in water

antacid tablets

molecule formed from two or more different elements

identifies the number of shells in the atom

part of the atom with no charge

atomic number = number of 

reaction in which two elements switch places

bitter taste

chalk

formed when an acid and a base neutralize each other

18

symbols and numbers used to shorten the name of a compound

horizontal rows on the periodic table

slippery to touch

20

atoms that have lost or gained electrons

Atomic Number

developed the periodic table of elements

bond that forms crystals

strong acids that eat away metals

The number of atoms of oxygen in H₂CO₃