A depiction of the arrangement of atoms in molecules and polyatomic ions

Plants don't move around, so why do they need energy?

Sodium only has one naturally occuring isotope, 23 Na, with a relative atomic mass of 22.9898 u. A synthetic, radioactive isotope of sodium, 22 Na, is used in positron emission tomography. 22 Na has a relative atomic mass of 21.9944 u. A 1.

Round off 61.40 to three significant figures.

Which of the following represents a chemical change? A. Bending a wire B. Freezing of water C. Fireworks exploding D. Melting of a wax candle

1. a) Binary ionic and binary molecular compounds have what two things that are similar in their composition? (b) What is one way they are different in their composition?

Which states of matter have no definite volume?

Which weighs more 10g of iron or 10g of water

Which pair of elements would combine to form an ionic compound? а b sodium and calcium sodium and chlorine carbon and oxygen carbon and sulfur с d

How many moles are there in 545g of Fe2O3?

How are magic minerals different from Felsic minerals? A. Mafic minerals contains lower levels of iron and magnesium. B. Mafic minerals contain more dark-colored, high-density minerals C.