Choose a topic from the list below. plant or animal cell
DNA structure
solar system
layers of the earth
volcano
atomic structure
digestive system
Research the topic enough to understand the basic concepts. Make a model using materials of your choosing, or design it using a graphic program such as Word, Power Point, Publisher, or any other that you are familiar with. Be sure your model is neat, well designed, accurate, detailed, and labeled. Write a 150 word explanation of your model. Include what your model represents, why it is difficult to study in real life, and what scientists have learned from the model.

Solar System

Explanation:

I really reccomend it, I used to lean on that topic.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms