Ap Chem first page

Question 1

What is the mass number of the isotope with 23 protons and 28 neutrons?

Answer 1

51

Atomic Numbers Pratans

Question 2

What element contains 23 protons and 28 neutrons?

Answer 2

Sodium

Element Symbol: Na

Question 3

Write the isotope notation for the isotope with 23 protons and 28 neutrons.

Answer 3

Na-51

Element Name: Sodium

Question 4

What is a covalent bond?

Answer 4

Bonds form between atoms by sharing electrons. The resulting collection of atoms is called a molecule.

Introduction to Chemical Bonds

Question 5

What is an ionic bond?

Answer 5

Bonds form due to force of attraction between oppositely charged ions. Ion - atom or group of atoms that has a net positive or negative charge. Occurs when atoms gain or lose electrons. Cation - positive ion; lost electron(s). Typically metals. Anion - negative ion; gained electron(s). Typically nonmetals.

Introduction to Chemical Bonds