Sodium an alkali metal and chlorine a halogen are both in period 3? of the periodic table. Which element has a higher ionization energy? Explain

How many protons. are in all chlorine CI atoms

A volleyball player hit a ball with a mass of 0.25 kg. The average acceleration of the ball is 15.5 m/s². How much force did the volleyball player apply to the ball? 3.87 m/s² 3.87 N 62.0 m/s² 62.0 N

What is the main difference between these two chemical formulas? • h2o • h2o2 a.) they represent two different substances b.) they represent different states of the same substance c.) they represent different elements combined chemically d.

Rank the following quantities from smallest to largest: 5,200, dozen, pair, gross, ream.

1 pts Steel wool wetted with vinegar is stuffed into a narrow mouth round glass bottle. A rubber balloon is then sealed over the mouth of the bottle. After several hours, the balloon inflates into the bottle in an inverted manner. What happened

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2

How many grams of methane, CH4 are produced from the complete reaction of 5.15 moles of carbon monoxide, CO

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?