June 2023 10 What is the number of electrons shared between the two atoms in an O2 molecule? (1) 6 (2) 2 (3) 3 (4) 4 Solution: Oxygen can...

June 2023 15 At STP, which property would be the same for 1.0 liter of helium and 1.0 liter of argon? (1) boiling point (2) density (3)...

Types Of Formulas Ionic: ionic compounds contain metal + nonmetal, or metal + polyatomic ion or two polyatomic ions. Metals can be found...

June 2023 36 Which formula represents calcium hydride? (1) CaH (2) CaH2 (3) CaOH (4) Ca(OH)2 Solution: Calcium hydride is an ionic...

Atomic Models And Experiments: The earliest model of an atom (Thomson Model) proposed that an atom is an indivisible hard sphere. Gold...

June 2023 1 Which phrase describes the nucleus of any atom? (1) has an overall positive charge (2) has an overall negative charge (3)...

On Periodic Table elements are arranged in order of increasing atomic number. The columns on the Periodic Table are called Groups....

June 2023 11 Which changes in both charge and radius occur when an atom loses an electron? (1) A negative ion is formed with a smaller...

Kinetics Kinetics refers to how fast the reaction happens (rate of reaction) and factors affecting it. Collision Theory states that in...

January 2023 Which statement describes the changes in bonding and energy that occur when a molecule of iodine, I2, forms two separate...