How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34?

? 19

? 15

? 34

Will you arrange the following substances according to their lattice energies, listing them from highest to lowest: MgS, KI, GaN, LiBr?

Why do gases exert pressure on the container? * The gas particles hit each other. The gas particles move quickly in all directions. The gas particles hit the container wall.

Metal cations are atoms that have a positive charge. What type of bond is a metal cation likely to form? A. covalent bond B. double bond C. single bond D. ionic bond

In run 1, you mix 8.0 mL of the 43 g/L MO solution (MO molar mass is 327.33 g/mol), 2.60 mL of the 0.040 M SnCl2 in 2 M HCl solution, 5.43 mL of 2.0M HCl solution, and 3.73 mL of 2.0M NaCl solution. What is the [Sn2 + ]?

Describe the relationship between Avogadro's number and one mole of any substance.

In which way does a na1 + ion differ from a neutral na atom?

Which would not be associated with stable atmospheric conditions afternoon thunder showers is the answer

Which is not a characteristic of a compound? It is a mixture of elements. It has properties that differ from its component elements. It has a fixed proportion of elements.

Can you think of other possible ways scientists can determine what climate was like in the past besides studying ice cores?

Which sub-layer thins out into space, where there is no air