Name an element in the third period (row) of the periodic table with one valence electron.

How can litmus paper and phenolphthalein be used to tell whether a solution is an acid or a base? Be specific.

Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas?

Discuss how scientists use data on waves to monitor the environment 1. 2. 3. 4. 5. 6. 7. 8. 9.

Consider the nuclear equation below. 239/94 Pu--> X + 4/2 He. What is X?

How would you change the distance between two charged particles to increase the electric force between them by a factor of 16? A. Reduce the distance by a factor of 4. B. Increase the distance by a factor of 16. C.

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.

What element has the electron arrangement 2,8,4?

If you get pregnant in Dec how long will it take for u to get to second trimester