What isotope has 13 protons and 14 neutrons? enter the name of the element followed by a hyphen and the mass number (e. g., uranium-234) ?

1. What property do elements share if they are on the same row of the periodic table? What if they are in the same column?

Calculate q, the heat released in each reaction. Use the equation q = cmåt. (Use c = 4.18 J/g.°C and the total mass, m.) Record to 2 significant figures. Reaction 1: Reaction 2: RETRY

beryllium has four protons in its nucleus. How many neutrons are in beryllium-9? Explain how you calculated your answer

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 24.

During the 1960s and 1970s, Cesar Chavez worked to unionize migrant farm workers by (1) seizing the land of the lettuce and grape growers (2) securing passage of federal legislation to limit immigration (3) using nonviolent tactics such as boycotts

Who wants to hang out?

Atoms whose outermost energy level is not filled may gain or lose valence electrons. What do you call these atoms?

Which group 7 element has the most least for electrons

How are elements organized in the periodic table

What is the molarity of solution prepared by dissolving 11.75 g of KNO3 in enough water to produce 2.00 L of solution?