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Chemistry Test

QuestionAnswer
Two particles found in the nucleus of an atom. Protons and neutrons
The 4 groups on the Periodic Table. Metals, semi-metals, non-metals, noble gasses
What type of bonds are forces that hold atoms together in a compound? Chemical
What type of charge do protons have? Positive
What type of charge do neutrons have? Neutral
What type of charge do electrons have? Negative
Matter made of just one kind of atom. Element
Atoms that have either lost or gained electrons and are electrically charged. Ions
What type of bonds are formed when atoms share electrons? Covalent
In which model of an atom do electrons move in orbits, or in the same path and direction? Bohr
In which model of an atom do electrons move randomly, or in all directions around the nucleus of an atom? Electron cloud
Substance formed when two or more elements combine chemically. Compound
What type of bonds are formed from the attraction of oppositely charged ions, or atoms that have lost or gained electrons? Ionic
Taste bitter, feel slippery, and are used in most cleaning products. Bases
Help with digestion in our bodies, react with metals and carbonates, and when found in foods make them taste sour. Acids
What type of change occurs when a substance changes its size or state? Physical
What type of change occurs when atoms are changed and new substances are created? Chemical
These compounds have covalent bonds. Molecules
What pH balance does a neutral substance have? 7
Which pH balance is an example of an acid? 5
Which pH balance is an example of a base? 12
An atom becomes negatively charged when it __________ an electron. Gains
With bases, litmus paper changes from what color to what color? Red to blue
With acids, litmus paper changes from what color to what color? Blue to red
An atom becomes positively chared when it ___________ an electron. Loses
What are the elements in a column of the periodic table called? Family
Created by: massameno