FINISH THESE QUESTIONS ILL GIVE YOU Write the symbol and name
for the cation formed when Symbol Name

(Example) A calcium atom loses two electrons Ca2+ calcium

A potassium atom loses one electron K+ Potassium ion

A zinc atom loses two electrons Zn2+ Zinc ion
A barium atom loses two electrons

Write the symbol and name for the anion formed when

(Example) A oxygen atom gains two electrons O2- oxide

A fluorine atom gains one electron

A sulfur atom gains two electrons
A nitrogen atom gains three electrons

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

If 16.00g of hydrogen gas reacts with 126.73g of oxygen, how many grams of water are yielded? (both reactants are completely consumed in the reaction.)