To which class of elements does copper (cu) belong: metal, metalloid, or nonmetal? identify three other elements in this class.

25.0 grams of argon are placed in a 20.00L container and the pressure is determine to be 1.250 atm. what is temperature of the gas?

Based on the table, which do you think is larger - your direct water use or your indirect water use? direct water use indirect water use

All information on a line graph is as precise as the information in the data table. True or False

How many atoms of iron are there in 2.01 moles of wolframite FeWO4

Suppose you wanted to make 100g of water what is the molar mass of water?

Write the isotope symbol for two isotopes of the same element. What makes the isotopes different? How are they similar?

According to the periodic table, which element has an atomic number of 40? a. u b. ca c. zr d. np

3. Which word best fits with the Earth's day and night cycle a. Revolution b. Rotation C Orbit d. Axis

What causes temperatures in the summer to be higher than temperatures in the winter? A. The greenhouse effect, which raises temperatures on Earth, takes place during the summer months only. B.

What naturally forms an anion?