Birds eat fruit from many plants. As they digest the fruit, they excrete the seeds. The birds spread the seeds around and help the
plants reproduce. What type of relationship is there between the birds and the plants?
A
parasitism
B. mutualism
C. predation
D.
commensalism

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: