Question

an element in the nitrogen family with a lower atomic number than tellurium

enter timical symbol of an element that matches. Otherwise check No in the second c Does any element match the If you checked yes, give the symbol of an element that matches. description description? An element in Period 6 and Group 8A.O Yes No A semimetal in Group 5A. O YesO No An alkaline earth metal with a lower atomic number than phosphorus 参Yes No A main-group element in Period 4 Yes No

Answer 1

Q1. An element in the nitrogen family with a lower atomic number than tellurium:

Yes, there are several elements exist which falls in the above category. Atomic number of Tellurium(Te) is 52. And below elements all have atomic number less than 52 and belongs to Nitrogen Family:

1. Nitrogen(N), Atomic Number: 7

2. Phosphorus(P), Atomic Number: 15

3. Arsenic(As), Atomic Number: 33

4. Antomony(Sb). Atomic Number: 51

Note: Symbol is written in brackets beside each element.

Q2. An element in Period 6 and Group 8A:

Yes, such element exist. The element is Radon and Symbol is Rn. This element belongs to Noble or inert gas family.

Q3. A semimetal in Group 5A:

Yes, there are semimetals in Group 5A. Those are:

1. Arsenic, symbol is As.

2. Antimony, symbol is Sb.

Q4. An alkaline earth metal with a lower atomic number than Phosphorus:

Yes, such element exist. The element is Magnesium, symbol is Mg, has atomic number 12 which is lower than the atomic number of Phosphorous i.e. 15.

Q5. A main-group element in Period 4:

Yes, there are several elements that falls in the Main-Group category in Period 4.

The elements are:

1. Potassium, symbol is K.

2. Calcium, symbol is Ca.

3. Gallium, symbol is Ga.

4. Germanium, symbol is Ge.

5. Arsenic, symbol is As.

6. Selenium, symbol is Se.

7. Bromine, symbol is Br.

8. Krypton, symbol is Kr.

Main-Group elements are the elements present in Group 1-2 and 13-18, with the exception of Hydrogen.