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Science > Vocab > Flashcards

Vocab Flashcards

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1
Q

Anion

A

An ion that has more electrons than protons and is negatively charged

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2
Q

Atom

A

The smallest unit of matter that forms a chemical element

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3
Q

Atomic number

A

The number of protons in a nucleus

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4
Q

Atomic symbol

A

A short-hand notation for describing an atom; consists of the chemical symbol, atomic number and mass number.

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5
Q

Cation

A

An ion that has more protons than electrons and has a positive charge.

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6
Q

Compound

A

A pure substance that consists of two or more different atoms chemically bound together.

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7
Q

Crystal lattice

A

A grid-like structure of atoms or ions in which each particle is bonded to all of its neighbouring atoms

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8
Q

Electron

A

A small, negatively charged subatomic particle that orbits around the nucleus in shells

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9
Q

Electron cloud

A

The region of negative charge surrounding the nucleus

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10
Q

Electron shell

A

Part of the electron cloud, layer that surrounds the nucleus and can only hold a certain number of electrons.

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11
Q

Element

A

A substance made up of only one type of atom.

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12
Q

Ion

A

An atom that has gained or lost an electron

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13
Q

Mass number

A

The number of protons and neutrons in the nucleus.

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14
Q

Molecule

A

A cluster of atoms that makes up an element or compound

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15
Q

Neutral

A

Having no overall chargeq

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16
Q

Neutron

A

A particle with no electric charge; found in the nucleus of an atom.

17
Q

Nucleus

A

A cluster of protons and neutrons in the centre of an atom.

18
Q

Proton

A

A positively charged particle in the nucleus of an atom.

19
Q

Subatomic particles

A

Smaller particles that atoms are made up of.

20
Q

Metalloid

A

An element that usually displays the properties of a non-metal but conducts electricity like a metal under similar conditions

21
Q

Acid

A

A substance that releases hydrogen ions in an aqueous solution

22
Q

Alkali

A

A base that dissolves in water.

23
Q

Alkaline solution

A

A solution made of base/alkali and water

24
Q

Base

A

A substance that releases hydroxide ions

25
Q

Indicator

A

A chemical that changes colour to show whether a substance is acidic, neutral or a base

26
Q

pH

A

A scale used to measure the concentration of hydrogen ions in a solution

27
Q

Polyatomic

A

Containing more than one type of atom.

Science (6 decks)

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