Which element, represented by X, reacts with fluorine to produce the compound XF2?

(1) aluminum (3) magnesium

(2) argon (4) sodium

Is the freezing of mercury a reversible or irreversible physical change?

Which of the following colors of visible light has the lowest energy? A) blue B) green C) red D) yellow

At night, the Moon appears bright. Which of the following explains this? a. The Moon reflects the light produced by the Sun. b. The Moon releases the light it absorbed during the day. c. The light from the Earth is reflected by the Moon.

Adam found a block made of lead, the density of lead is 11.36 g/cm 3. The lengths of the blocks sides are 5 cm, 1.5 cm, and 3 cm, respectively. How heavy is adams block

The periodic table is based on an element's

The atomic mass oftitanium is 47.88 atomic mass units This atomic mass represents the 1) total mass of all the protons and neutrons in an atom of Ti 2) total mass of all the protons, neutrons, and electrons in an atom of Ti 3) weighted average mass

How many milliliters of. 45m hcl will neutralize 25ml of 1m koh?

Explain an example of a chemical bond

What is the oxidation number of chlorine

What is a triglyceride? Draw the skeletal structure for a saturated triglyceride whose hydrocarbon tails each contain six carbons.