As the elements in Group 17 are considered in order of increasing atomic number, the chemical reactivity of each successive element

(1) decreases

(2) increases

(3) remains the same

A particle with 10 protons, 11 neutrons, and 12 electrons has a mass number of:

If 82.3 l of an ideal gas is cooled from 46 degrees calius to - 166 what will the volume of the gas become

Small quantities of h2 gas can be collected by adding hcl to zn. a sample of 195 ml of h2 gas was collected over water at 25 c and 753 mm of hg. what mass of h2 was collected? (vp of water at 25 c is 24 mm of hg)

What is the difference between a strong acid and a concentrated acid?

Which electrons in an atom make chemical bonds? why?

When red litmus paper is added to limewater, then what will be the change in litmus paper? Give reason. Write the chemical formula of limewater also.

Explain why the lattice energy of CaSe is approximately 4 times as large as that of KBr. Check all that apply. Check all that apply.

A 1.0 g sample of food reacts with oxygen in a calorimeter containing 500 g of water. The temperature rises 10°C. What is the energy content of the food?

Looking at the diagram showing hydrochloric acid being added to water. Which statement best explains what is taking place

How many dozens of particles of dust are in 2.45 grams if each dust particle has a mass of 2.51 x 10-4 grams?