Which radioactive isotopes did the Curies discover?

1) polonium and radium

2) radium and carbon-14

3) carbon-14 and uranium

4) uranium and polonium

1. What are the horizontal (from left to right) parts of the periodic table called? rows periods families

Which is another name for groups of elements

In the experiment involving hydrated copper sulfate, overheating causes a high calculated percent value for water. why is the high reading obtained?

What happens to the total mass of the carbon and oxygen after they form carbon dioxide?

Specific Heat of Water = 4.186 J/g°C Specific Heat of Ice = 2.00 J/g°C Molar Heat of Fusion = 6030 J/mol Molar Heat of Vaporization = 40790 J/mol You take an ice cube (mass = 18g) from the freezer (T = - 10ºC) and place it on the table.

Consider the polymerization of styrene in toluene at 60°C initiated by di-t-butylperoxide for a solution containing 0.04 mol of initiator and 2 mol of monomer per liter. The initial rates of initiation, Ri, and propagation, RP, are found to be 1.

If an atom has an atomic number of 15 and an atomic mass of 31, how many protons, neutrons and electrons does the atom contain?

What is formed when sediment is blown against an obstacle and settles behind it

Compared to the radius of a chlorine atom, the radius of a chloride ion is (1) larger because chlorine loses an electron (2) larger because chlorine gains an electron (3) smaller because chlorine loses an electron (4) smaller because chlorine gains

What do you think made the blizzard so dangerous?