Which of the following elements can have 8 neutrons? Select one:

a. O

b. Al

c. P

d. S

Sodium metal (Na) and chlorine gas (Cl) are two reactive and dangerous elements. Chlorine is a halogen gas that can cause respiratory damage and sodium is an alkali metal that reacts violently with water.

Which group has 4 valence electrons

6. What is the total number of calories lost when 10 grams of water at 80°C is cooled to 60°C? A) 10 B) 20 C) 100 D) 200

Thallium-207 decays exponentially with a half life of 4.5 minutes. if the initial amount of the isotope was 28 grams, how many grams of the isotope will remain after 7 minutes?

Conversion factor 2.23 seconds to kilograms

Write a word equation for the extraction of tin from tin oxide using carbon

What is the electron configuration for neon?

Whats a pure substance that can not be broken down into any other substances?

Does the moon's shadow change relative to the sun

Which of the following is the least reactive nonmetal,?