How do the sizes of atoms change as we move from left to right across a row in the periodic table?

What is volume? A. half of the density of a substance B. the amount of matter in a substance C. twice the amount of mass of a substance D. the amount of space a substance takes up

If the wavelength of a wave stays the same, what happens when the wave period increases? a. increase in wave speed c. decrease in wave speed b. increase in wave height d. decrease in wave height

Do a mole of Na and a mole of NaCl contain the same number of Na atoms?

Which formula contains two non-metals? BaO KI NaBr SiO2

Is aluminum found in mineral or compound?

Which of the following do scientists use to form a hypothesis?.

How many moles of carbon are in 7.87x10^7 carbon molecules?

The phases of the moon are caused by the changing positions of the Earth and the Moon in relation to the Sun. Which items could best be used to represent the Sun, the Earth, and the Moon in a model that shows the phases of the Moon? A.

Describe your observations of the original solutions. Describe your observations when the silver nitrate was added to the sodium chloride solution.

A gas occupies 18.5L at stp. what volume will it occupy at 735 torr and 57°c?