Which principal energy level of an atom contains an electron with the lowest energy?

A) n=1

B) n=2

C) n=3

D) n=4

What are the three categories of scientific reasoning described by Aristotle

Which of these contains generic material but is not classified as living?

What type of combination is a mixture? A. electrical B. chemical C. physical D. thermal

How do I figure out how many valance electrons an element has?

Nitric acid reacts with silver metal 4hno3 + 3ag = no + 2h2o + 3agno3. calculate the number of grams of no formed when 10.8 g of ag reacts with 12.6g of hno3

Type of ion formed by group 2A elements

Identify each energy exchange as heat or work. Drag the appropriate items to their respective bins. melted wax

23 Which term identifies a type of organic reaction? (1) deposition (3) esterification (2) distillation (4) sublimation

several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear is white. What process led to to this difference in fur color.

What will be the outcome of putting litmus paper into bleach? a. red paper turns blue, blue paper turns red b. red paper does not change, blue paper turns red c. red paper turns blue, blue paper does not change d.