Select the correct answer from each drop-down menu.

the graph shows the heating curve of a chemical substance as it undergoes state changes from solid to liquid to gas. analyze the curve, and answer the questions.

the substance is entirely solid between positions,
a and b
b and c
c and d
d and e
e and f

particles of the substance are in the liquid state and are gaining kinetic energy between positions,
a and b
b and c
c and d
d and e
e and f

1- A and B.

2- C and D.

Explanation:

Kindly, see the attached image carefully that shows the analysis of  state changes from solid to liquid to gas at the heating curve of a chemical substance as it undergoes state changes from solid to liquid to gas.

So,

1- The substance is entirely solid between positions,  A and B.

2- Particles of the substance are in the liquid state and are gaining kinetic energy between positions, C and D.

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.

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.