Chemical Bonding

Construct the electron shell diagram for an atom of potassium (19K). Then identify the number of valence electrons in the potassium atom. Then complete the following sentence:

For potassium to become an ion, it will _____________ (gain /lose) ________ (a number) electrons and become a/an___________ (cation/anion)

Which of the following is most directly involved in chemical bonding?

• valence electrons

• neutrons

• alpha particles

• protons

___Fe + ___O₂ ---> ___Fe₂O₃

Which set of coefficients will correctly balance the equation?

• Already Balanced (no coefficients needed)

• 2, 3, 4

• 4, 3, 2

• 3, 2, 2

MgCl2 + Na ---> NaCl + Mg

What type of reaction is shown by the equation?

• Combination/Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Why do bonds form?

• To fill the valence shell of electrons for the elements involved

• to release energy stored in the bonds

• because whenever you mix two chemicals, there will be a reaction

• because of attraction

The type of covalent bond present in a nitrogen molecule is a

• Double bond

• Triple bond

• Single bond

• Dative bond

Which of the following is the correct name for the compound PbO?

• lead oxide

• lead monoxide

• lead (I) oxide

• lead (II) oxide

When Alkali metals (Group 1) form ions, they ____.

• lose 1 proton

• gain 1 proton

• lose 1 electron

• gain 1 electron

What is the correct IUPAC name for the compound P₂O₅?

*IUPAC stands for International Union of Pure and Applied Chemistry and it is the naming system that we use in class.

• phosphorus pentoxide

• diphosphorus pentoxide

• phosphorus oxide

• potassium oxide

Which of the following elements is most likely to form an incomplete octet?

• Carbon

• Oxygen

• Boron

• Fluorine