The octet rule pertains to:

a. only the noble gases.

b. only groups 1A and 2A.

c. elements in Groups 1A - 7A.

d. all elements in the periodic table.

What are the functions of a leaf? 1. to make food and control how much water is sent to the root 2. to store food and absorb water 3. to make lignin and allow the plant to grow 4. to make food and control how much water leaves the plant

How do i find the isotopic notation?

At higher temperatures, A) reaction rates increase because reactants move faster, collide more often, and produce more collisions with the required energy of activation.

Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury

Which type of rock forms as a result of cooling and crystallization? a) clastic b) metamorphic c) sedimentary d) igneous

Which 2 continents have the most obvious fit of the coastlines. subject science

A substance with a ph of 6 is called

56 Explain, in terms of atomic structure, why the elements in Group 2 have similar chemical properties. 131

What must molecules do to react? a. Molecules must heat up b. Molecules must collide c. Molecules must expand to fill their container d. Molecules must interact with a catalyst

How many pictograms are in a gram?