How many neutrons does an element have if its atomic number is 45 and its mass number is 160?

a molecule of ozone gas has has three atoms of oxygen. witch of these describes ozone most specifically?

Manuel observes a chemical reaction between one atom of silicone and two atoms of oxygen which answer choice correctly list the Chemical formula of the compound produced by the reaction? SI1+O2 - Si1O2 SIO^2 SIO2

Which of these can be classified as a substance A) oxygen B) carbon dioxide C) air D) acid rain

Explain the energy transformation that must occur for your body to participate in a physical activity, such as playing a sport.

For the following, identify the process as a spontaneous process, a nonspontaneous process, or an equilibrium process at the specified temperature: (Assume that the thermodynamic data in the appendix do not vary with temperature.

What element has two electrons in its fourD sub level

La temperatura a la cual las partículas de los gases no se mueven es: 1) Cero grados centigrados 2) 273 K 3) cero absoluto 4) cero grados Fharenheit

Compare the hydronium ion concentration of the solution having a ph of 2.0

Look at the following chemical formula. How many total elements and total atoms are present in the formula? 2NaHCO3

How many covalent bonds does hydrogen have