The Atom Flashcards
(22 cards)
What is the relative charge of a proton?
+1 (positive)
What is the relative charge of a electron?
-1(negative)
What is the relative charge of a neutron?
0(no charge)
What is the relative mass of a proton?
1
What is the relative mass of a electron?
0.0005
What is the relative mass of a neutron?
1
Middle part of the atom?
Nucleus
The circle going round the nucleus?
The shell
What are the dots on the shell?
Electrons
How many electrons are allowed on the 1st shell?
2 maximum
How many electrons are allowed in the 2nd shell??
8 maximum
How many electrons allowed in the 3rd shell??
8 maximum
How many electrons allowed in the 4th shell?
18 maximum
What is electronic configuration?
A diagram of an element and the sequence
Why does an atom have no overall charge?
Element atoms contain equal number of protons and electrons and so have no over all charge
39
K
19
A)What is the mass number?
B)What is the atomic number?
C)How many neutrons?
A)39
B)19
C)20
How do you find out how many neutrons an element has?
Atomic mass- atomic number
On the periodic table how many groups are there?
8 groups
On a periodic table how many periods are there?
7 periods
If their is 2 protons in a element how many electrons are there?
2 because protons and electrons have the same amount of charges in any element
What are isotopes?
Isotopes are different forms of the same element,which have the same number of protons but a different number of neutrons
How do you work out what element belongs in which period?
The number of shells which contain electrons is the same number as the period
