Unit 2 Lesson 5 & PreTest Review
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Last updated about 5 hours ago
5 questions
Required
1
What is the correct AZ notation for an element withy 12 protons, 13 neutrons, and 13 electrons?
What is the correct AZ notation for an element withy 12 protons, 13 neutrons, and 13 electrons?
Required
1
How many electrons does this element have: 199F-2
How many electrons does this element have: 199F-2
Required
1
What element has 7 electrons and a +2 charge?
What element has 7 electrons and a +2 charge?
1
1