Chemistry, 04.07.2019 23:30 oliviaclerk5

What is the formula of the compound formed between oxygen (o) and sodium (na)? ona, because oxygen gains one electron and sodium loses one electron. ona2, because oxygen gains two electrons and sodium loses one electron. na2o, because oxygen gains two electrons and sodium loses one electron. nao, because oxygen gains one electron and sodium loses one electron.

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Answer from: colochaortiz20p7cajw

Na_2O , because oxygen gains two electrons and sodium loses one electron.

Explanation:

Na_2O is an ionic compound because sodium element is a metal which loses one electron to give Na^+ and oxygen element is a non-metal which gains two electrons to give $O^{2-}$ .

The bond formed between a metal and a non-metal is always ionic in nature.

The chemical formula of ionic compounds is given by:

1. Positive is written first.

2. The negative ion is written next.

Hence, the formula of sodium oxide is Na_2O .

Answer from: Quest

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

Answer from: Quest

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

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