An atom is composed of a nucleus surrounded by electron clouds of varying sizes. The nucleus contains protons and neutrons, while electrons move about the nucleus in the electron clouds. Which of the following statements is also true of atoms?
A.
Even though the nucleus of an atom is very large, most of the atom's mass is in the electron clouds.
B.
The nucleus of an atom is very small, so most of the atom's mass is in the electron clouds.
C.
Even though the nucleus of an atom is very small, it contains most of the atom's mass.
D.
The nucleus of an atom is very large, and it contains most of the atom's mass.

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

explanation:

newton's third law, for every action there is an equal and opposite reaction.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it