Question

this element has one more proton than caesium (cs). this element has 8 protons in its nucleus. this element has 17 electrons surrounding its nucleus. this element has an atomic number of 85. this element has two less electrons than the element whose atomic number is 85. this element is directly above the element with an atomic number of 13. this element has 15 electrons surrounding its nucleus. this element has 5 less protons than argon (ar). the atomic number of this element is 7. the element has 14 electrons surrounding its nucleus. this element is found directly above the element whose atomic number is 14. this element has 82 protons in its nucleus. this element has 2 more protons than indium (in). this element has 52 protons in its nucleus

Explanation:

Step1: Recall atomic - number facts

The atomic number of an element is equal to the number of protons in its nucleus. In a neutral atom, the number of electrons is equal to the number of protons.

Step2: Identify element for "one more proton than Caesium (Cs)"

Caesium has an atomic number of 55. So the element with one more proton has an atomic number of 56, which is Barium (Ba).

Step3: Identify element for "8 protons in its nucleus"

An element with 8 protons has an atomic number of 8, which is Oxygen (O).

Step4: Identify element for "17 electrons surrounding its nucleus"

Since the number of electrons in a neutral atom is equal to the number of protons, an element with 17 electrons has an atomic number of 17, which is Chlorine (Cl).

Step5: Identify element for "atomic number of 85"

The element with an atomic number of 85 is Astatine (At).

Step6: Identify element for "two less electrons than the element whose atomic number is 85"

The element with atomic number 85 has 85 electrons. Two less electrons means 83 electrons and 83 protons, which is Bismuth (Bi).

Step7: Identify element for "directly above the element with an atomic number of 13"

The element with an atomic number of 13 is Aluminium (Al). The element directly above it in the periodic - table is Boron (B).

Step8: Identify element for "15 electrons surrounding its nucleus"

An element with 15 electrons has an atomic number of 15, which is Phosphorus (P).

Step9: Identify element for "5 less protons than Argon (Ar)"

Argon has an atomic number of 18. 5 less protons means an atomic number of 13, which is Aluminium (Al).

Step10: Identify element for "atomic number is 7"

The element with an atomic number of 7 is Nitrogen (N).

Step11: Identify element for "14 electrons surrounding its nucleus"

An element with 14 electrons has an atomic number of 14, which is Silicon (Si).

Step12: Identify element for "directly above the element whose atomic number is 14"

The element with an atomic number of 14 is Silicon (Si). The element directly above it is Carbon (C).

Step13: Identify element for "82 protons in its nucleus"

The element with 82 protons has an atomic number of 82, which is Lead (Pb).

Step14: Identify element for "2 more protons than Indium (In)"

Indium has an atomic number of 49. 2 more protons means an atomic number of 51, which is Antimony (Sb).

Step15: Identify element for "52 protons in its nucleus"

The element with 52 protons has an atomic number of 52, which is Tellurium (Te).

Answer:

1. Barium (Ba)
2. Oxygen (O)
3. Chlorine (Cl)
4. Astatine (At)
5. Bismuth (Bi)
6. Boron (B)
7. Phosphorus (P)
8. Aluminium (Al)
9. Nitrogen (N)
10. Silicon (Si)
11. Carbon (C)
12. Lead (Pb)
13. Antimony (Sb)
14. Tellurium (Te)