How many electrons are present in a tin atom with a mass number of 119

What is the standard unit used to measure mass

Compared to the charges of a proton the charge of an electron has 1. a greater magnitude and the same sign 2. a greater magnitude and the opposite sign 3. the same magnitude and the same sign 4. the same magnitude and the opposite sign

Explain why the radius of an atom cannot be measured directly. (6.3)

The following volumes of solution are combined in a test tube: 2.00 mL of 0.20 M potassium iodide 1.00 mL of 1% starch 0.50 mL of 0.20 M ammonium persulfate 0.50 mL of 0.012 M sodium thiosulfate 2.00 mL of 0.20 M potassium nitrate 2.00 mL of 0.

As you good down Group 1 what happens to the reactivity

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.