Radioisotopes tell scientists that Earth is how old?

A. 65 million years

B. 500 million years

C. 4.5 billion years

D. 13.4 billion years

Practice 14 The mass of a proton is approximately 1) 1/2000 times the mass of a neutron and a unit positive charge 2) 1/2000 times the mass of a neutron and a unit negative charge 3) 2000 times the mass of an electron and a unit positive charge 4)

What's the formula for the ionic compound composed of cesium and nitride

What is the percentage of aluminum in aluminum oxide (al2o3?

Solve the problem. Express your answer to the correct number of significant figures 6.221 x 7.11-13.7=

Mummification frequently preserves fine detail and internal organs true or false

Which of the following is NOT true of nitrogen fixation? (A) it is a process that occurs exclusively in some species of prokaryotes (B) it sometimes occurs in bacteria that are mutualistic symbionts in plant roots (C) it is the metabolic process

What two pieces of information do u need to describe force

Why are the atomic masses for most elements not whole numbers?

An aqueous solution is 0.387 m in hcl. what is the molality of the solution if the density is 1.23 g/ml?

Carbon monoxide reacts with oxygen to form carbon dioxide. 2 CO (g) + O2 (g) → 2C02 (8) In a 1.00 L flask, 3.40 atm of CO reacts with 2.60 atm of O2. Assuming that the temperature remains constant, what is the final pressure in the flask? 4.30 atm 2.