In an atom:

The nucleus is made of electrons and protons.

Protons have positive charges.

Neutrons have negative charges.

All of the above.

In a college there are exactly 3000 students, exactly 60% are male. What is the number of female students

Why thre is no atmosphere in moom,?

Suggest two ways to liquefy the gases.

A 25.00 ml sample of h3po4 solution is neutralized by exactly 54.93 ml of 0.04345 m ca (oh) 2. what is the molarity of the h3po4 solution?

What is the volume of gas at 2.00atm of pressure if the volume of the gas was 30.0L at 5.50atm of pressure assuming the temperature remains constant

What are the first five elementsof the periodic table?

Name 3 characteristics that can be used to identify minerals

Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecules ad contains 0.340 percent iron by mass. calculate the molar mass of hemoglobin

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.

Elements on the periodic table are arranged by increasing?