Questions #1 & 2:
An atom gains an electron ---> +1
An atom loses an electron ---> -1
Questions #3-9:
Type of element
Na is an Alkali metal, Cl is a non-metal.
Atomic number
The atomic number for Na is 11, the atomic number for Cl is 17.
Number of valence electrons
Na has 1 valence electron, Cl has 7 valence electrons.
Stable or unstable?
Na is stable, Cl is unstable.
Electron transfer
Ionic bond. (For both sides)
Description after transfer
Na has lost an electron and gave it to Cl; Cl has gained Na's electron.
Type of ion
Na is a positive ion, Cl is a negative ion.
Question 10:
Step-by-step explanation:
A metal with a positive charge loses an electron and transfers it to a non-metal with a negative charge.
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I hope this helps! Feel free to ask me questions if you're confused about something. ^^