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☆☆☆☆☆Genes are arranged on twisted strands called DNA. DNA is housed in the nucleus and controls the cells functions and systems.
trigonal pyramidal
two ions can combine in only one combination
The type of bond is determined by the difference in electrongativity of atoms
C.A molecule that has a symmetrical shape will be a nonpolar molecule.
The lone pair pushes bonding electron pairs away.
The development of irrigation.
The atoms sharing the electron pairs will spread out around the central atom. Apex
Helium has the highest first ionization energy and francium has the lowest first ionization energy.
The lone pair repels the electrons of the adjacent bonds more so than does a bonding pair of electrons, so thus alters the molecular geometry of the molecule.
a hydrogen bond
The food we eat is fresher because it is treated with preservatives.
