What Are the Ions Present in the Compound CH₄

Q132: An atom of the isotope ¹³⁷Ba consists

Q133: Give the number of protons (p), neutrons

Q134: How many electrons, protons, and neutrons

Q135: The number of neutrons in all atoms

Q136: What is the ion ClO₄^- named<br>A) chloride

Q138: Which of the following elements is chemically

Q139: Give the formula of ammonium sulfate.<br>A) (NH₄)₂SO₃<br>B)

Q140: An oxide ion, O^2-, has:<br>A) 8 protons

Q141: Which of the following are isotopes<br>A) (¹⁴C)

Q142: Give the formula of iron(II) phosphate.<br>A) Fe₃(PO₄)₂<br>B)