Answer:
"A molecular, or covalent bond, is formed when atoms bond by sharing pairs of electrons. This sharing can occur from atom to atom, or from an atom to another molecular bond."
Explanation:
Google
Answer:
frogs, fish and aquatic (water-dwelling) insects
Explanation:
Oxygen and selenium both have 6 valence electrons. They're in the same group hope this helps
Answer:
z≅3
Atomic number is 3, So ion is Lithium ion (
)
Explanation:
First of all
v=f*λ
In our case v=c
c=f*λ
λ=c/f
where:
c is the speed of light
f is the frequency

Using Rydberg's Formula:

Where:
R is Rydberg constant=
z is atomic Number
For highest Energy:
n_1=1
n_2=∞

z≅3
Atomic number is 3, So ion is Lithium ion (
)
Beaker of water i guess because usually at home when i get out cold water i put in my room and it cools fast for me so..... i think