Atoms Atoms Everywhere Round the mass number to
Atoms, Atoms Everywhere Round the mass number to the nearest whole number!
P E Be 4 O 8 12 Mg N 4 Electrons in 1 st shell Electrons in 2 nd shell Electrons in 3 rd shell 5 2 2 ---- 8 8 2 6 ---- 12 12 2 8 2 P 15 15 16 2 8 5 S 16 16 16 2 8 6 Ar 18 22 2 18 8 8
a. The atomic number for Silicon is 14, how many protons are there? _______ 14 b. The atomic number for Silicon is 14, how many electrons are there? ______ 14 c. The atomic mass for Silicon is 28, how many neutrons are there? 14 ____ d. There are 31 protons in an atom of Gallium, what is the atomic 31 number? _____ e. How many neutrons are in an atom of Gallium if the atomic mass is 70? 39 f. If there are 10 protons and 10 neutrons in an atom of Calcium, what is 20 the atomic mass? _______ g. How many electrons are in an atom of Sulfur if the atomic number is 16 16? _____ 19 h. How many electrons are in an atom of Potassium? _______ i. How many protons are in an atom of Potassium? ______ 19 21 j. How many neutrons are in an atom of Potassium? _______ k. What is the atomic mass of Potassium? ______ 39 19 l. What is the atomic number of Potassium? ____ m. What is the family or group number for Potassium? 1 n. What is the row or period number for Potassium? 4
Beryllium Mass # ___ Atomic # ___ 9 4 P- 4 N- 5 2 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 2
Mass # ___ Atomic # ___ Oxygen 16 8 P- 8 N- 8 6 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 16
Mass # ___ Atomic # ___ Magnesium 24 12 P- 12 N- 12 2 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 2
Mass # ___ Atomic # ___ Phosphorus 31 15 P- 15 N- 16 5 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 15
Mass # ___ Atomic # ___ Sulfur 32 16 P-16 N-16 6 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 16
Mass # ___ Atomic # ___ Argon 40 18 P- 18 N- 22 8 How many electrons are in the OUTERmost shell? _______ What group # is it in? ____ 18
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