Hi, can you post what you need help with??
Answer:
John Dalton
Explanation:
John Dalton in 1808 suggested that all matter consists of tiny particles called atoms and that the atoms of a specific element are identical.
He postulated the Dalton's atomic theory which has the following important parts;
- All matters consists of indivisible particles called atoms
- Atoms of the same element are similar and are different from atoms of other elements.
- Atoms can neither be created nor destroyed.
- Atoms combine in simple whole ratios to form compounds.
Answer:
c. iron I hope it helped.....
Answer:
Lithium loses one electron to fluorine and forms ionic bond, having formula
.
Explanation:
Lithium is the element of the group 1 and period 2 which means that the valence electronic configuration is
.
Fluorine is the element of the group 17 and period 2 which means that the valence electronic configuration is
.
<u>Thus, lithium loses 1 electron and become positively charged. Fluorine on the other hand accepts this electron and become negatively charged.</u> This is done in order that the octet of the atoms are complete. <u>These both ions then form ionic bond as their will be electrostatic interaction between the two oppositely charged ions.</u>
Thus, the formula of calcium chloride is
.