Next → What Is an Ecosystem?: Mastery Test
4
Drag each sentence to the correct location on the chart.
Sort the sentences based on whether the adaptations are characteristics of organisms in the desert or the taiga.
Trees have dark-colored
leaves to maximize
absorption of sunlight
Plants have structures
that conserve water.
Trees have soft, green
needles.
Animals have thick fur.
Animals have the ability
to burrow to escape the
heat.
Desert
Taiga

- 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

i believe the answer is 5,000