Chapter 4- Periodic Table Flashcards
Isotopes…
Atoms of the same element with the same number of protons but different number of neutrons
Calculation to find relative atomic mass of isotopes…
(% x abundance) + (% x abundance) divided by 100
Chemicals on the periodic table are…
Elements
Metals are found on the…
Left
Non metals are found on the…
Right
The cllums are called…
Groups
The rows are called…
Periods
Electronic configuration…
2, 8, 8
How are elctrons organised in an atom?
In energy levels or shells
The lowest energy level is closest to the nucleus
What does the group number tell you?
How many electrons are in the outer shell
The period number tells us…
How may shells there are in the atom
How may elements are there in this chemicla symbol?
CaCO3
3
We can tell by looking at the number of capital letters
