Answer:
A base.
Explanation:
Basic solutions give OH- ions.
The purpose of a switch in a series circuit is to make it easy to open or close the electrical circuit, turning the flow of electricity on or off. A light bulb in a series circuit is used to determine whether or not electricity is flowing.
Answer:
B. smaller and upside-down
Explanation:
Answer:
44 years will take for 10 grams of Actinium to decay until there were only 2.5 grams.
Explanation:
The half life it tell you about the time in which half of the quantity of the isotope will decay.
time (years) quantity of isotope (grams)
0 10
22 5
44 2.5
<span>Elements must be heated before they emit colored light because the heat being added to the elements will allow for a reaction to happen between the element and the oxygen in air. They are endothermic reactions where energy is needed in order for the reaction to proceed.</span>