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Chemistry > Chapter 1 > Flashcards

Chapter 1 Flashcards

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1
Q

relative charge of a proton?

A

+

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2
Q

relative charge of a neutron?

A

0

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3
Q

relative charge of a electron?

A

-

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4
Q

relative mass of a proton?

A

1

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5
Q

relative mass of a neutron?

A

1

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6
Q

relative mass of an electron?

A

0

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7
Q

What is the charge of the nucleus?

A

positive

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8
Q

what fraction of the cell is the nucleus ?

A

1/10,000

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9
Q

what is the charge of an atom?

A

neutral

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10
Q

what is the plum-pudding model?

A

a ball of positive charge with electrons scattered randomly throughout, no empty space, no protons neutrons or nucleus, JJ Thompson.

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11
Q

What did Earnest Rutherford do?

A

He discovered the nucleus.

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12
Q

How did Rutherford discover the nucleus?

A

Rutherford fired positive particles at an atom, most went straight through meaning there was empty space, but some deflected as the positive charge of the nucleus repelled them like magnets and some bounced back showing there is a small, dense nucleus.

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13
Q

What did Bohr do?

A

Bohr discovered that electrons exist in shells

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14
Q

definition of an element

A

a substance made up of only one type of element.

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15
Q

definition of a compound

A

two or more different elements that are chemically combined

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16
Q

definition of a chemical reaction

A

when a new substance is made

17
Q

what is filtration used for?

A

separating solids and liquids

18
Q

what is crystalisation used for?

A

separating soluble solid from liquids

19
Q

what is distillation used for?

A

separating solutions or multiple solids

20
Q

what is chromotography used for?

A

separating different substances dissolved in a liquid

21
Q

definition of an isotope

A

where the number of neutrons differs but the number of protons stays the same

22
Q

what is the formula to find the average atomic mass of an isotope?

A

(mass of isotope 1 x percentage of atoms have that number of neutrons) + (mass of isotope 2 x percentage of atoms that have that number of neutrons) over 100

23
Q

what is the atomic number?

A

the number of protons in an atom

24
Q

what is the atomic mass number

A

the number of protons and neutrons in an atom

Chemistry (2 decks)

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