an atom of element Y has an electronic structure of 2.8.5. Would the element Y be a metal or non-metal? Explain your answer

A crane lifts a cargo box 10 m off the ground. If the crane lifts the cargo box twice as high, the potential energy will increase by

what is the mineral group of graphite

A hypothesis is developed by determining a way to test multiple uncontrolled variables. T or F?

In an atom, the number of electrons is unrelated to the number of protons. TRUE FALSE

A sample of soil from a newly discovered cave is analyzed by a team of explorers. They find an element that is a good conductor of electricity. It also forms a chloride in the form XCl2 and an oxide in the form XO.

One atom of silicon can properly be combined in a compound with a. three atoms of hydrogen. b. four atoms of calcium. c. two atoms of oxygen. d. one atom of chlorine.

How many carbon atoms are present in a mole of 12C?

What is the formula for copper (II) phosphate? Capitalization and punctuation count. How many atoms of phosphorus are in 7.10 mol of copper (II) phosphate?

What is the formula of barium hydroxide? (chemistry) ?

Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. what is the molar concentration of h3o + in a cola that has a ph of 2.670