Chemistry #1 Flashcards

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1
Q

Atom

A

Smallest unit of an element

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2
Q

Nucleus

A

Central part of an atom and it is composed of protons and neutrons, where the most of its mass is

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3
Q

Proton

A

A positively charged particle that is a component of a nucleus

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4
Q

Neutron

A

An uncharged particle that is a component of a nucleus

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5
Q

Electron

A

A negatively charged particle that orbits the nucleus

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6
Q

Quark

A

Makes up an atom and is smaller than one

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7
Q

Molecule

A

A group of atoms bonded together that is the smallest unit of a chemical compound

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8
Q

Alkali Metals

A

Is the first group in the periodic table and are very unstable and unhappy

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9
Q

Noble Gases

A

Last group in the periodic table and never interacts with other elements because it always has a full shell of electrons

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10
Q

Cation

A

A positively charged ion

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11
Q

Anion

A

A negatively charged ion

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12
Q

Valence Shell

A

The outermost shell in an atom

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13
Q

Valence Electrons

A

The electrons that are in the valence shell

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14
Q

Ion

A

A positively or negatively charged molecule due to a loss or gain of an electron

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15
Q

Octet

A

Is a full shell of 8 electrons in the shell

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16
Q

Element

A

Pure substances made up of only one type of atom

17
Q

Compound

A

Substance made up of two or more types of atoms that are chemically bonded together

18
Q

Mixtures

A

A combination of substances in which each keeps its own properties

19
Q

Metals

A

Elements that conduct heat and electricity, shiny solids that are tough

20
Q

Non Metals

A

Elements that do not conduct electricity or heat, they melt and turn into gases easily and are brittle and often coloured

21
Q

Metalloids

A

Elements that look like metals but have the properties of non metals