Periodic Table Flashcards
1
Q
What was special about Mendeleev periodic table?
A
He left gaps for unknown elements and predicted their properties
2
Q
What does the atomic number tell you about an atom?
A
Number of protons
3
Q
What order are the elements in, on the modern periodic table?
A
Atomic number
4
Q
How did Mendeleev organise the elements in his periodic table?
A
By mass number, so elements with similar properties were in same group
5
Q
Where in the periodic table do you find the metals
A
On left
6
Q
Where in periodic table do you find the non- metals
A
On the right
7
Q
Write the electron configuration of lithium
A
2.1
8
Q
Write the electron configuration of chlorine
A
2.7
9
Q
Write the electron configuration of calcium
A
2.8.8.2
10
Q
What does the electron configuration 2.8.4 tell us about an atom
A
Group 4, period 3
