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Flashcards in atomic theory Deck (26)
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1
Q

atoms are made up of

A

protons, neutrons and electrons

2
Q

electron location:

A

energy levels outside the nucleus

3
Q

proton location:

A

inside nucleus

4
Q

neutron location:

A

inside nucleus

5
Q

electron mass:

A

nearly 0

6
Q

proton mass:

A

1

7
Q

neutron mass:

A

1

8
Q

proton charge:

A

positive, +1

9
Q

electron charge:

A

negative, -1

10
Q

neutron charge:

A

none

11
Q

atomic no. of an elements tells you

A

how many protons an atom contains

12
Q

1st energy level can hold

A

2 electrons

13
Q

2nd energy level can hold

A

8 electrons

14
Q

a period goes

A

across the period table

15
Q

groups are

A

columns in the periodic table

16
Q

all elements in the same group have

A

the same no. outer electrons

17
Q

mass number or an element is equal to

A

no. of protons + no. of neutrons

18
Q

isotopes are

A

atoms with the same atomic no. but different mass no.

19
Q

nuclide notation arrangement:

A

atomic no at the top

mass no at the bottom

20
Q

relative atomic mass (RAM) is

A

average mass of all the isotopes of a single element

21
Q

atoms are neutral because

A

they have an equal no. of positive protons and negative electrons

22
Q

when the no. of protons and electrons are not equal,

A

an ion is formed

23
Q

an ion is

A

a charged particle that is formed when an atom gains or loses electrons

24
Q

metals atoms …… electrons to form …

A

lose electrons to form positive ions

25
Q

non-metal atoms …… electrons to form..

A

gain electrons to form negative ions

26
Q

noble gases have a

A

stable electron arrangement