Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement for nitrogen?

A. 2, 7

B. 2, 5

C. 2, 2, 3

D. 2, 8, 4

Why can television satellites, which broadcast information as electromagnetic radiation, send signals from the vacuum of space?

In the world of chemistry, a 'mole' is a number of something ... a very large number of something. Just as a 'dozen' is 12 of something, a 'mole' is about 6.02*10^23 of something.

Classify each of the following properties of a cake as qualitative or quantitative. Give reasons for your answers A) it's a circular shape B) its mass is 1.5 kg C) it taste like chocolate D) it is 30 cm in diameter E) its icing is melting

Enter a balanced equation for the dissolution of caco3.

When the following equation is balanced, what is the coefficient for CaCl2? Ca (s) + 2HCl (aq) - - > CaCl2 (aq) + H 2 (g) 3 6 1 2

If 1.0 mole of CH4 and 2.0 moles of Cl2 are used in the reaction CH4 + 4Cl2 = > CCl4 + 4HCl then which of these statements is TRUE? A. All of the CH4 will be used up. B. The theoretical yield of CCl4 is 1.0 mole. C. Some Cl2 will be left over. D.

Why do humans primarily form communities? A. To analyze group behavior B. To meet the needs of groups and individuals C. To preserve language and culture D. To make and follow codes of conduct

Which of the following is fact-based science rather than part of a belief system a. astrology b. paranormal investigation c. chemistry d. philosophy e. cultural rituals

Meanders form when a river flows across bedrock? true or false

Tank a contains a mixture of 10 gallons water and 5 gallons pure alcohol. tank b has 12 gallons water and 3 gallons alcohol.