chemistry Flashcards

1
Q

what are isotopes

A

isotopes are atoms of the same element that have the same number of protons but a different neutrons

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2
Q

state the term ionic bond

A

when two oppositely charged particles are attracted to each other by electrostatic attraction

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3
Q

state the type of bonding in graphite

A

covalent bonding

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4
Q

whats an alloy

A

an alloy is a mixture of two or more elements where at least one is metal

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5
Q

define proton number

A

its the number of protons in an atoms nucleus which determines the element

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6
Q

state one industrial use of radioactive isotopes

A

for research like carbon-14

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7
Q

whats an atom

A

.
the smallest particle of a chemical element

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8
Q

whats a compund

A

A compound is a substance formed when two or more different elements chemically combine

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9
Q

whats an element

A

An element is a pure substance made of only one type of atom, defined by its number of protons.

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10
Q

whats an ION

A

a charged atom

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11
Q

what is the centre of an atom called

A

A nucleus

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12
Q

what is the charge on an electron

A

negative

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13
Q

which of the three sub-atomic particles is the lightest

A

electrons

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14
Q

what is the atomic number of an atom equal to

A

The atomic number of an atom is equal to the number of protons in the nucleus of that atom

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15
Q

where are the electrons inside an atom located

A

they are in the outer shell

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16
Q

two general properties of a liquid

A

liquids take shape of an object
they have a fixed volume

17
Q

the arrangement of liquid bromine and motion

A

there particles are fairly spaced
there molecules slide past each other

18
Q

the arrangement of bromine gas and the motion

A

they are scattered
they move freely

19
Q

define the term electrolysis

A

a process that uses electricity to breakdown an ionic compund

20
Q

whats an anion

A

the negatively charged ion

21
Q

cation

A

a positively charged ion

22
Q

whats an electrode

A

a rod of metal or graphite through which an electric current flows in and out of an electrolyte.

23
Q

whats an electrolyte

A

`a liquid substance that contains freely moving ions