Which of the following are lost or gained during a nuclear reaction?

A) Electrons and nucleus

B) Electrons and neutrons

C) Protons and electrons

D) Protons and neutrons

Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (RD) strontium (SI) zirconium (Z1) silver (Ag)

What is the atomic theory timeline

What percent yield of ammonia is produced from 15.0 kg each of h2 and n2, if 13.7 kg of product are recovered? assume the reaction goes to completion?

Write down the balanced chemical equation for the reaction of sodium with water

At the bottom of the ocean, a rock has a mass 25 g. At sea level, the same rock will have a mass of: B? less than 25 g more than 25 g exactly 25 g

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin