All atoms of a given element must contain the same number of A)protons
B)neutrons
C)electrons plus neutrons
D)protons plus neutrons

Select the correct answer. you have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. if the house circuit provides 120.0 volts, what is the current through this bulb?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide