When elements with four electrons in the outermost shell react chemically, they

A. Always gain 4 electrons

B. Always lose 4 electrons

C. May lose, gain, or share 4 electrons

D. May lose or gain 4 electrons

Where did the periodic table come from

Which adaptations to the capillaries enable substances to pass to and from cells?

Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period, and iodine in the fifth period. Which element has the largest first ionization energy?

A cold glass of iced tea warms quickly on a hot day through the process of a. expansion. b. radiation. c. conduction. d. convection

What evidence can be used to to determine if the change is a physical change Choose all that apply The solid dissolved The solid formed bubbles The solid changed colors The combination produced heat

What is conserved in the reaction H2 (g) + Cl2 (g) - - >2HCl (g)

Is a eagle a producer?

which of these pairs of elements is most likely to be a part of a polyatomic ion? k an cl li and br p and o Ca and O

An enzyme is a protein that acts as a catalyst in a chemical reaction that takes place in a living thing true or false

Three types of single called organisms