How many electrons does strontium have to give up to achieve a noble gas electron configuration?

Which of the following is a chemical change? A. Sulfur and iron filings are mixed together in a beaker at room temperature. B. Sulfur and iron filings are mixed together and the iron is removed with a magnet. C.

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.0*1015Hz?

List two examples of solids, liquids, and gases

How many atoms of oxygen are represented in 2Fe (NO3) 2? 3 6 12 18

Summer, temperature can reach 35.5 °C. What is the temperature in Kelvin?

A student makes observations when water is added to a blue solution of copper sulfate. The student makes only 1 observation: the solution changes to a lighter shade of blue. Is this an example of a chemical reaction? Explain your reasoning.

When dos the spring tide occur

As ice transforms into steam, Question options: new molecules are formed. the types of atoms are changed. energy is absorbed by the molecules. the mass of the molecules is increased.

Why do chemists consider the periodic table so useful?

Plates include large sections of Earth Oceanic or Continental