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ANMAN YR2 > Fundamentals of Science > Flashcards

Fundamentals of Science Flashcards

1
Q

Who created the first version of the periodic table?

A

D.I. Mendeleev

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2
Q

How was the first version of the periodic table grouped?

A

The first version grouped elements according to atomic mass.

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3
Q

What did the first version of the periodic table find out about the families?

A

The families had similar chemical properties.

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4
Q

Why were there blank spaces left in the first version of the periodic table?

A

Blank spaces were left for new elements to be added.

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5
Q

What is the radius of an atom?

A

0.1nm (1x10^-10m)

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6
Q

What is the radius of a nucleus?

A

The radius of a nucleus (1x10^-14) iss less than the radius of an atom.

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7
Q

What does atomic mass mean?

A

The average mass of the elements isotopes

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8
Q

Why is the atomic mass not normally a whole number?

A

Because it considers the relative abundance of isotopes.

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9
Q

What does atomic number mean?

A

The number of protons in the atoms nucleus.

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10
Q

What is the relative mass of a proton?

A

1

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11
Q

What is the relative mass if a neutron?

A

1

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12
Q

What is the relative charge of a proton?

A

+1

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13
Q

What is the relative charge of a neutron?

A

0

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14
Q

What is the relative charge of an electron?

A

-1

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15
Q

What is the relative mass of an electron?

A

1/2000

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16
Q

Why would someone carry out a risk assessment before doing lab work?

A

To assess safety
Minimise risk
Reduce hazards

17
Q

How do you calculate how many protons are in an element?

A
  1. Find the element on the periodic table
    2.Identify and write down the atomic number.
    Atomic number = Number of protons
18
Q

How do you calculate how many neutrons are in an element?

A

Atomic mass - Atomic number = Neutrons

19
Q

What is an isotope?

A

Atoms of the same element that contain the same number of protons but a different number of neutrons.

20
Q

What can isotopes be used for?

A

X-rays
Cancer treatment (chemo/radio)
Nuclear reactor fuel

21
Q

How do you work out the RAM?

A

(AR of isotope 1xAbudance of isotope1)+(AR of isotope2xAbundance of isotope2)
/100

22
Q

What makes sure that the overall charge of an atom is 0?

A

The fact the protons and neutrons are the same numbers.

23
Q

What are the shells lettered as on an atom?

A

K L M N

24
Q

How many electrons can go on K shell?

A

2 electrons

25
Q

How many electrons can go on L shell?

A

8 electrons

26
Q

How many electrons can go on M shell?

A

18 electrons

27
Q

How many electrons can go on N shell?

A

32 electrons

28
Q

Lithium has 3 electrons, how would this be written?

A

K(2), L(1)

ANMAN YR2 (3 decks)

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