Fluorine and oxygen
A metal carbonate (such as calcium carbonate) or a metal bicarbonate (such as sodium bicarbonate) would most likely produce a gas when reacting with an acid. This is because carbonates and bicarbonates release carbon dioxide gas when they react with acids.
Vitamin D and Calcium
Two fathers who live in the same neighborhood
its a dove
A ordered pair is one of many ways in which a function may be defined. The function maps the element in the first position of an ordered pair to the second element in that pair.
Carbon and oxygen are the only pair in that list that will form a covalent bond; the others will form ionic bonds, except for copper and tin which will form a metallic bond.
An electronegative atom is an atom that can attract a bonding pair of electrons from another atom. Fluorine is the most electronegative element.
Quartz and feldspar are the most likely pair of minerals found in felsic rock. Felsic rocks are rich in silica, which forms minerals like quartz, and feldspar is another common mineral found in these rocks.
Vitamin D and Calcium
Average winter temperature and the cost of heating the house
True
Depends HOW you are moving your hand, but most likely wrist flexor and extensors