Which elements combine by forming an ionic bond

1) sodium and hydrogen

2) sodium and oxygen

3) carbon and oxygen

4) carbon and sulfur

Why do scientist sometimes discard theories? A - the steps Scientific met that were not followed in order B - public opinion disagrees with the theory C - the theory is opposed by the church D - contradictory observations are found E - congress

What did scientists learn from the information found on seismographs? how deep the ocean is the structure of the Earth's crust the depth and density of Earth's layers the elements present in the interior

Most fruit juices are a solution of water, sugar, and fruit-specific chemicals. in this solution, identify the solvent and solutes.

if atoms of lithium and sodium easily give up a single electron which other elements also have this property

At 1500°c the equilibrium constant for the reaction co (g) + 2h2 (g) ch3oh (g) has the value kp = 1.4 * 10-7. calculate? g° for this reaction at 1500°c.

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?

A gas has a volume of 30 L at 105 kPa. What pressure is required to compress the gas to 21 L?

Using special equipment which layer of the sun atmosphere is visible during a total solar eclipse

The characteristic flame test colors of metal ions are due to atomic emission spectra. Duscuss the relationship between the absoption and emission of light and the factors responsible for flame test colors.