Carbon and silicon are in group 4 of the periodic table. The atomic radius of carbon is 77 pm and sulfur is 177 pm. What is the circumference of each atom?

Which of the following is an example of how a scientist might use a model? A. The end of a slinky is moved vertically up and down to simulate a wave B. A wrench is used to tighten a nut onto a piece of wood C.

Write the formula for aluminum oxide.

In the molecule hcl, which atom is the negative pole? in the molecule, which atom is the negative pole? cl h

How is the Nazca plate moving in relation to the Pacific plate?

Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.

When an ionic compound is named or its formula is written, what sort of element is placed first? What is the charge on its ions?

A larger glass has 100 mL of a liquid and a smaller glass has 50 mL of a liquid. Which glass of liquid would have more energy? Calculations must be done first because energy depends on both temperature and mass.

Xco3 enter the group number of x

A carbon molecule that has a different arrangement of atoms is known as a/an a. isomer. b. nucleotide. c. peptide. d. monomer.

A 10.0 ml solution of 0.300 m nh3 is titrated with a 0.100 m hcl solution. calculate the ph after the addition of 10.0 ml hcl.