An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element?

Ο Α. 10

Ο Ο

Oc. 30

OD. O

ΟΕ. 200

What is the main sense organ for each of the five senses

A chemical change : a. occurs when powdered lemonade is stirred into water. b. occurs when water is vaporized. c. occurs when paper is shredded. d. occurs when salt is dissolved in water. e. occurs when methane gas is burned.

Color tests are more specific that microcrystalline tests in identifying a particular drug. A. True B. False

Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.7 L sample from the atmosphere at sea level (1.00 atm) on a warm day (25 ∘C), how many CO2 molecules are in your sample?

Which substances are always produced in an acid-base neutralization reaction?

What type of change is a substance that changes form but remains the same?

Which side of the mountain experiences high temperature in windward or leeward

How does light pollution affect plants and animals? Light pollution harms plants and animals because they confuse it with

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.