Answer:
A. wearing sunglasses to to protect eyes from UV rays
Explanation:
Your eyes are outside of your body, meaning external. All the other choices deal with internal organs.
The correct statement to fill the blank would be the first option. Atomic energy is the energy in the nucleus of an atom of electrons and their shells. From the word atomic itself, we can say that this energy is energy within and carried by the atoms.
Answer:
0.0272801
Explanation:
17.6 
* 
* 
= 0.02728005 in^2. You have to square the value of 2.54 to convert cm to cm^2.
Explanation:
The region x of the atom shown is called the nucleus of the atom shown. The nucleus of an atom contains protons and neutrons.
- Protons are the positively charged particles found in the nucleus
- Neutrons do not carry any charges.
- Together protons and neutrons determines the mass of the atom.
- The mass of an atom is concentrated in the nucleus
- Both particles have equal masses
The region y is the atomic orbital where electrons can be found.
Answer:
He (helium, that is) has 2 protons in its nucleus.
Explanation:
The placement of numbers around an element's symbol can be confusing. Generally, an element symbol written in this format has the atimic mass in the upper left and the element number on the lower left. The upper right is the lement's charge, zero in the is case because there are two electrons and two protons, for a net charge of zero.
Some symbols will include additional information, such as electron configuration. Be aware of a publication's standard for the notation style used.
