<span>Valence electrons are those in the outer most orbital shell (the valence shell). Elements in the same column (group) have the same number of valence electrons. Hydrogen is in Group 1. If you were to look at a periodic table of the elements, Lithium is right under Hydrogen.
You are correct, the answer is D. Lithium.</span>
Answer:

Explanation:
Hello,
In this case, assuming oxygen as an ideal gas, it is described by:

Whereas the gas constant R is required, therefore, it is computed as shown below:

Best regards.
Answer:
1. Students need to measure masses of the items.
2. Put baking soda and vinegar in a plastic bag and close it.
3. Mix the two, allowing for a reaction to occur.
4. Figure the mass of the plastic bag while the two components are inside.
5. The combined mass should be equal to what each weighed on their own.
Explanation:
Protons are positive
Neutrons are neutral
Electrons are negatively charged
Answer: northern hemisphere
Explanation: I looked it up. Plus I took a test with this question and when the teacher went over the answer i got it right.