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R di h Reading the Periodic Table
What does Atomic Mass tell us?
QUESTIONQUESTION…How could you find the number of
neutrons???
Answer: Atomic mass (rounded)
Atomic #
Atomic mass (rounded)
Atomic #
# of neutrons# o o s
Lets give it a Try!
H t How many protons, electrons, and
t d N neutrons does Ne have?
10 p+
10 e-
10 010 n0
Let’s PracticeLet s Practice…
Find the number of p+ e- and n for each Find the number of p , e , and n for each element:
1. H 2. He 3. Tb
1 p+ 2 p+ 65 p+
1 e- 2 e- 65 e-1 e 2 e 65 e0 n 2 n 94 n
HOMEWORK…Find the number of p+ e- and n for each element:Find the number of p , e , and n for each element:
1 Si1. Si2. Hg3 F3. Fe4. Ta5. Pt
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