Identify the element with the electron configuration of 1s2 2s2 2p6 3s2 3p3

Shawn conducted an experiment and did not get the results he was expecting. What should he do first? A) Shawn should write conclusions. B) Shawn should share his results. C) Shawn should explain what he thought should have happened.

There are three competing factors at play here: 1. The effective nuclear charge 2. The size of the atom and the force of attraction according to Coulomb's law 3.

A student needs to use the metric system while measuring the length of a box. Which units should he use? centimeters inches feet yards

Avogadro stated that all gases at STP occupied 22.4 L. Suppose the density of air at STP is 1.285 g/L. Which of the following cannot be used to fill a balloon that will float in air at STP?

Which statement best describes the function of an enzyme produced in the salivary glands in the mouth?

What are the basic building blocks of matter? A) molecules B) atoms C) electrons D) compounds

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?

8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.

Is calcium carbonate a compound element or mixture?