50 points 10 for each question will mark brainliest

question 1
which statement best describes how mass is distributed throughout the atom?

question 1 options:

electrons have very little mass, so most of the mass is located in the nucleus.

each part of the atom has about the same mass.

the mass of the atom is equally distributed throughout the atom.

the mass of the atom is all in the nucleus, and the electrons have zero mass.

question 2
which of the following statements most accurately describes the number of subatomic particles to account for the overall charge of an aluminum atom?

question 2 options:

aluminum has 13 protons and 13 neutrons and is therefore neutral.

aluminum has 13 protons and 14 neutrons, so it has 27 electrons and the overall charge is zero.

aluminum has 13 protons and 13 electrons and is therefore neutral.

aluminum has 13 protons and 16 electrons, so it has an overall charge of +3.

question 4 (0.1 points) question 4 saved
the sun produces tremendous amounts of energy. some of that energy reaches earth and affects earth’s systems. which statement explains how the sun produces this energy?

question 4 options:

the sun produces energy through combustion reactions through out it.

the sun produces energy through fusion reactions in its core.

the sun produces energy through convection cells on its surface.

the sun produces energy through radioactive decay in its core

question 5 (0.1 points) question 5 unsaved
which of the following will have the largest influence on the lifetime of a star?

question 5 options:

elemental composition

mass

volume

temperature

question 6
choose one of the following to complete in this long answer question. you must answer one of these (in your own words) in order to get an b+ or higher on this pre-test.

a) compare and contrast the main parts of an atom.

b) what questions do you have about atoms?

c) what questions do you have about radioactivity?

d) what questions do you have about the sun and its energy, or other stars and their energy?

Q1) Electrons have very little mass, so most of the mass is located in the nucleus.

--- electrons have a mass of 1/10000000000000000000

Q2) Aluminium has 13 protons and 13 electrons so therefore is neutral

--- however when aluminium becomes an ion it loses 3 electrons to gain a full outer shell leaving behind only 10 electrons with a charge of 3+

Q4) The sun produces energy through fusion reactions in its core

---this reaction is called nuclear fusion and basically converts Hydrogen atoms into Helium. The product in the sun's core is a massive amount of energy that gets released and radiates towards the surface of the sun and then outwards to the Earth.

Q5) Mass

---It depends... Although a higher-mass strain may contain more material, it will burn through itself faster due to higher core temperatures... Which are causes by gravitational forces. Compared to the sun which will spend 10bill years to die, a star 10 times as massive will only stick around for 20 Mill years

Q6) A) COMPARE AND CONTRAST THE MAIN PARTS OF AN ATOM

An atom if made up of a central nucleus, which contains protons and neutrons. While the protons are positively charged, the neutrons have no charge. This is why the neutrons are positively charged - because protons take over the charge of neutrons, which have no charge. The nucleus is surrounded by shells. These shells contain electrons which orbit the nucleus, a bit like how the Earth orbits the Sun. These electrons have a negative charge. Usually in atoms, there is an equal amount of protons and electrons, however if there are more protons than electrons, the atom will have an overall charge of positive. But if an atom contains more electrons than protons, the overall charge will be negative.

Aside from this, the overall charge on most atoms are neutral due to the same number of protons and electrons.

Explanation:

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.