A physical science teacher calculates each student's final grades by using the weighted rubric below.
Final exam:
Quizzes:
Class project:
Class participation
Total:
50%
20%
20%
10%
100%
Which type of graph is best suited to show the breakdown of how this teacher weighs each category?
line graph
scatterplot
pie graph
frequency distributio

a polar bond is formed when electrons are shared unevenly between atoms

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.