The Periodic Table Flashcards
(7 cards)
1
Q
What is the symbol for Magnesium?
A
Mg
2
Q
All of the elements in a group have what?
A
The same number of electrons in their outer shell
3
Q
How many electrons does helium have?
A
Two
4
Q
What does the top number of a symbol mean?
A
Mass number, the total number of protons and neutrons
5
Q
What does the bottom number of a symbol mean?
A
Atomic number, the number of protons which also tells you the number of electrons
6
Q
How do you find the number of neutrons in an atom?
A
Subtract the atomic number from the mass number
7
Q
Which side of the periodic table are metals?
A
The left side under Boron
