Four students drew part of the rock cycle on the board. Which drawing was correct? Metamorphic
rocks
Heat
Igneous
rocks
0
Sedimentary
rocks
Deposition and
compaction
Igneous
rocks
O Magma
Cools slowly
under Earth's
surface
Intrusive igneous
rocks
Metamorphic
rocks
Heat and
pressure
Sedimentary
rocks

- 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 just learnt this recently but i need to look through my notes again

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.