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3 votes
Given the atomic

notation of 19/9 X, identify element X.
a fluorine
b neon
C potassium
d nickel

2 Answers

3 votes

Answer:

a

Step-by-step explanation:

its electron arrangements is 9

User Hdomos
by
7.0k points
2 votes

Answer: Choice A) fluorine

Step-by-step explanation:

The notation
^(19)_9X refers to some element X that has 9 protons and 19 protons and neutrons (so that means 19-9 = 10 neutrons). The element that has 9 protons is fluorine (symbol F on the periodic table)

This means
^(19)_9X would update to
^(19)_9F

User Thoomas
by
6.8k points