What determines an atom's reactivity?

A) How many protons the atom contains.

B) How many energy levels the atom contains.

C) Whether the atom is a metal or a nonmetal.

D) How many valence electrons the atom contains.

Dimensional analysis: if you count at the rate of 2 numbers every secound, how many days whould it take you to count to 1 million?

As the elements in period 2 of the Periodic Table are considered in order from left to right, which property generally decreases? 1) Atomic radius 2) Electronegativity 3) ionization charge 4) Nuclear charge

What is the number of valence electrons in an atom of Al? a. 13 b. 3 c. 10 d. 8

Non-luminous flame is yellow. Explain

total mass of the Syringe. Record it in the correct row of the data table. how many kilograms would it be?

Which of the following statements is true? Water is easily polluted because it can dissolve harmful chemicals O When water freezes, it contracts and becomes more dense.

What causes combustion in cars?

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms?

A 0.450 g0.450 g sample of impure CaCO3 (s) CaCO3 (s) is dissolved in 50.0 mL50.0 mL of 0.150 M HCl (aq) 0.150 M HCl (aq).

Define and explain bond energy.