An atom of magnesium has an atomic number of 12 and a mass number of 24. how many protons plus neutrons are in the nucleus

What is the relationship between atomic numbers and atomic radii of elements in group 2a

What mass of magnesium bromide is formed when 1.00 g of magnesium reacts with 5.00 g of bromine?

A change in the nucleus of an atom that converts the atom from one element to another element is called (1) combustion (3) polymerization (2) neutralization (4) transmutation

Which sample of matter is a single substance? (1) air (3) hydrochloric acid (2) ammonia gas (4) salt water

If the results of a study do not support a hypothesis, it means that the experiment failed. is this true or false

Which usually has a higher temperature? A city or the areas around the city?

Toluene and pyridine form ideal solutions. Consider a solution of toluene and pyridine prepared at 25°C. Assuming that the mole fractions of toluene and pyridine in the vapor phase are equal, calculate the composition of the solution.

Formula for water what does the lack of a subscript after those O indicate

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.