What is the correct electron configuration for magnesium? (use periodic table)

A) 1s22s22p5

B) 1s22s22p6

C) 1s22s22p63s2

D) 1s22s22p63s23p2

How do you calculate atomic mass from an isotope?

Which of the following may be used by employers to inform workers about hazardous materials A. Employee training and SDS B. Memos and handouts C. SDS and warning signs D. Employee training and memos

When an acid solution exactly neutralizes a base solution, which acid-base combination always produces a mixture with a pH less than 7?

Which of the following is not a part of Dalton's atomic theory? A. All elements are composed of atoms. B. Atoms of the same element are alike. C. Atoms are always in motion. D. Atoms that combine do so in simple whole-number ratios.

What does a salt bridge do

What part of an original isotope's number of atoms remains after two half lives?

What gas has formed when bubels form when water is boiled?

A physical property can be observed or measured without changing the identity of a substance. Which of these choices describes a physical property? The temperature at which a liquid will boil. The tendency of a substance to explode.

What is the correct order of sediment size from smaller particles to bigger particles?

How do the chemical properties of oxides change from left to right across a period? From top to bottom within a particular group?