Author Question: Which of the following is a characteristic of the modern periodic table? (Read 49 times)

Alainaaa8 · **on:** Jun 7, 2021

Question 1

What elements are in hydroxyapatite, Ca₅(PO₄)₃OH, a major compound in human bones and teeth?
◦ carbon, potassium, oxygen, hydrogen
◦ calcium, phosphorous, oxygen, helium
◦ calcium, phosphorous, oxygen, hydrogen
◦ carbon, phosphorous, oxygen, helium
◦ carbon, potassium, oxygen, helium

Question 2

Which of the following is a characteristic of the modern periodic table?
◦ The elements in each group have similar chemical properties.
◦ The B groups contain the representative elements.
◦ The A groups contain the transition elements.
◦ A group is a horizontal row on the periodic table.
◦ A period is a column on the periodic table.

nguyenhoanhat · **Reply #1 on:** Jun 7, 2021

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