Periodic Table Flashcards
1
Q
What were the problems with Newland’s periodic table?
A
he assumed that all the elements had been found
2
Q
What was the ‘law of octaves’?
A
properties of an element repeated every eighth element
3
Q
How did Mendeleev order the elements?
A
weight horizontally and their properties vertically
4
Q
Why was Mendeleev’s periodic table accepted by other scientists?
A
elements that were discovered later on fit exactly in the spaces he had left for them with the properties he had predicted
5
Q
How did Mendeleev allow his table to work?
A
willing to swap the position of elements if they fit better
6
Q
What are the properties of metals?
A
- high melting and boiling points
- solid at room temp
- forms positive ions
- electrical and thermal conductors
- malleable
7
Q
What are the properties of non-metals?
A
- low melting and boiling points
- electrical and thermal insulators
- forms negative ions
- brittle
8
Q
How many electrons do Group 1 metals have on their outer shell?
A
one electrons
