Answer:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Step-by-step explanation:
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Pronoun
A pronoun is a word used to stand for a noun
Answer:
yes, i think it is correct :)
Step-by-step explanation:
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Yes. Bc 8 have a negative sign infront of it so 9 greater
Answer:b=2.5555555555...
Step-by-step explanation:9b= -23, 9b/9=b, -23/9=2.55555..., b=2.55555...
