What is the mass number of the isotope of calcium (ca) containing 20 neutrons?

Would fluorine's chemical properties resemble those of oxygen or those of chlorine?

What is the mass of one mole of oxygen molecules?

An element has 8 protons and 8 neutrons in its nucleus what is the atomic and mass number

In an experiment, a petri dish with a colony of bacteria is exposed to cold temperatures and then warmed again. Time (hours) 0 1 2 3 4 5 6 Population (1000s) 5.1 3.03 1.72 1.17 1.38 2.35 4.08 a. Find a quadratic model for the data in the table.

How do you know if a reaction is endothermic?

Is it true or false that gamma rays have no mass and no electrical charge

True or False? Urea has a high solutiblity in water, due in part to its ability to form hydrogen bonds

Give a reasonable explanation why segments 2 and 4 are not associated with temperature increases even though heat is added a constant rate.

20.0 g of Nitrogen is produced when oxygen gas reacts with NO gas. 29.8 L of oxygen is required at STP to produce this 20.0 g of NO. A. yes B. false

What are some chemical properties of Nitrogen?