Answer:
A pair of oxygen atoms is a molecule of oxygen. A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms.
Explanation:
Answer: A. The stone thrown upward spends more time in the air.
Explanation:
The stone thrown above the horizontal has an initial vertical speed, whose direction is opposed to gravity. It means that it decelerate first before accelerating in the direction of gravity. Where the stone thrown below the horizontal has an initial vertical speed in the direction of gravity, so there is no deceleration.
In consequence, the stone thrown upward spends more time in the air. Correct answer is option A.
Answer:
True
Explanation:
Transmutation is known as the change of substance from one to the other substance by radioactive decays or nuclear reaction process.
The beta decay is the radioactive process in which proton is converted into neutron then there is decrease in proton number this beta decay is called positron emission beta plus decay.
If the neutron is changing into proton which means there is an increase in proton number these decay is called beta minus decay.
Therefore, by the above discussion it can be say that a radioactive decay or can say that nuclear reaction which result in a nuclei with greater than or lesser proton that the initial nuclei is called transmutation.
Decrease in atmospheric ozone, which results in lower protection from various stellar particles