Newton
SI unit of Force is in Newtons (N). 1 Newton is equal to 1 kg*m*s^-2. The basic formula for force is F=ma where F stands for force, m stands for mass in kilograms and a stands for acceleration in m*s^-2. This is the Newton's second law of motion.
Answer:
the principal energy level of an electron refers to the shell or orbital in which the electron is located relative to the atoms nucleus. the first element in a period of the periodic table introduces a new principal energy level.
Explanation:
the electrons surrounding an atom are located in region around the nucleus called "energy level".
Answer:
matter
Explanation:
any thing that has mass and volume is matter. basically everything expect light and energy.
Answer:
a. A compound can be a pure substance.
b. A compound can be isolated.
Explanation:
a. A compound can be a pure substance.
This is because a compound which is made up of two or more atoms is also a pure substance since, a pure substance is a substance that contains only one type of matter - that is, it is in a single phase of matter.
Examples of compounds include water (H₂O) and ammonia (NH₃)
b. A compound can be isolated.
This is because, since it is a pure substance, it has unique properties which distinguish it from other compounds.
Answer:
Hello There!!
Explanation:
I believe the answer is C) The presence or absence of a nucleus.
hope this helps,have a great day!!
~Pinky~
