UITIVEise dlu
C JUIUI UYU
The big bang theory states that the universe is approximately
Which number best completes the sentence?
14 thousand years old
14 million years old
14 billion years old
14 trillion years old

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

: )

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

true                                                                                                       true true true true true true

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).