An element's atomic number is the

A. weight of the atom.

B. sum of the protons and neutrons in an atom.

C. number of protons in an atom's nucleus.

D. mass of the atom

What do the quantities "atomic number" and "mass number" represent?

What is a male function

Form a hypothesis sharks don't have swim bladders and must move constantly or they sink. hypothesize about the amount of food that a shark must eat compared to the amount eaten by a bony fish of the same size

An atom of rubidium has 37 protons and 48 neutrons. If the atom loses one electron what will be the charge on the ion that forms? -36 +1 36 -1

Which of the following would not have the same number of valence electrons as the others? boron aluminum gallium selenium

Refrigerators are usually kept at about 5°C, while room temperature is about 20°C. If you were to take an ""empty"" sealed 2-liter soda bottle at room temperature and place it in the fridge, would you expect it to contract to one-fourth its original

You want to analyze a cadmium nitrate solution. what mass of naoh is needed to precipitate the cd2 + ions from 32.7 ml of 0.499 m cd (no3) 2 solution?

How much is 35° C in F?

Which describes a precipitate in a chemical reaction? a a gaseous product formed from aqueous reactants b a solid reactant that forms aqueous product c a gaseous reactant that forms aqueous products d a solid product formed from aqueous reactants

Prepare a solution that is 0.1 M acetic acid and 0.1 M sodium acetate by measuring out 5.0 mL of the 1.0 M acetic acid solution and 5.0 mL of the 1.0 M sodium acetate solution in a 100 mL graduated cylinder, diluting the 10.