According to the periodic table, how many protons are in the nucleus of one atom of the element iron?

a. 9

b. 26

c. 55.85

d. 77

Which is evidence that a chemical Reagan occurred? A. A phase change occurs B. A new gas is observed in the form of bubbles C. Red and yellow paint mixing to make orange D. The temperature of the substance remains constant updates

Which of the following is a nonmetal? A) Calcium B) Aluminum C) Potassium D) Iodine

What's the compound name Na3N

Which of these best explains what happens when ice melts to form liquid water?

On the surface cost benefit analysis seems straightforward

Consider two solutions, solution a and solution b. [h+] in solution a is 370 times greater than that in solution b. part a what is the difference in the ph values of the two solutions?

All of the following are possible sources of error in a scientific investigation except for O measuring materials such as mass and volume incorrectly. o recording experimental data incorrectly. o having a constant in your experiment.

Do polyatomic ions have fixed charges?

Which type of organism is used to make bread rise when baking? A. plants B. protists C. yeast D. bacteria

How many particles are in 3.55 moles of Aluminum Sulfate