Which ion has no electrons

The most active of all the chemical elements is a halogen known as?

Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons.

What is a pure substance that can be separated into two or more simpler substances by chemical means?

5.22x10-3 = [? ]x 10-2

5/10 5.00 moles of an ideal gas X was found to occupy a volume of 62.0 L at a pressure of 250. KPa and at a temperature of 100 *C. What is the value of the gas constant in? mol:K mol-K (3 sig fias) Enter the answer (1) Oops.

When 10.7 g of Al are reacted with 42.5 g of HCl, what volume of H2 will be produced at 47 C and 725 mmHg? Formula: 2Al+6HCl=2AlCl3+3H2

Increasing the temperature increases the rate of a many reactions by:

2A balloon filled with helium occupies 20.0 L at 1.50 atm and 25°C. How many moles of helium will there be in the balloon at STP? A. 22.4 moles B. 1.12 moles C. 0.0446 moles D. 0.893 moles E. 1.23 moles F. 4.55 moles

1. Which has a larger radius Ca atom or Ca+2 ion? 2. Which has a greater radius F atom or F - ion? 3. Which is the correct way of understanding the trend for Ionic radius Vs. Atomic radius?

For which of the following activities might you want to hire a chemist? A. examining the structure of plant cells B. building a fence C. building a wood storage shed D.