How do optical telescopes work?

What is the chemical fluoride for carbon tetrafluoride?

What energy resource doesnt pollute when used

An atom has 17 protons and 18 neutrons. Which symbol represents that atom, including its mass number? 35Cl 33Ar 32Cl 34S

The process by which water vapor changes to liquid water is called a. condensation. b. evaporation. c. freezing. d. melting.

Which element consists of positive ions immersed in a "sea" of mobile electronsa) sulfur b. nitrogen c. calcium d. chlorine?

Write the symbol for the ion formed when each element gains electrons and attains a noble-gas electron configuration. Br, H, Se.

A student is planning an investigation of an acid-base reaction. Which of the following is not an accepted method of monitoring the progress of the neutralization reaction? Question 16 options: Conductivity meter pH paper Visual indicator

One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reaches earth?

What is melted rock and minerals found below earths crust

What do many bases have in common? A. They often release oxygen gas. B. They often form hydrogen ions. C. They often release hydrogen gas. D. They often form hydroxide ions.