5. how many protons do the following elements have? magnesium____ zinc____ sodium____ barium____ carbon____…

Explanation:

Step1: Recall atomic number = proton number

The number of protons in an atom is equal to its atomic number. We will look up the atomic number for each element.

Step2: Look up magnesium

Magnesium (Mg) has an atomic number of 12, so it has 12 protons.

Step3: Look up zinc

Zinc (Zn) has an atomic number of 30, so it has 30 protons.

Step4: Look up sodium

Sodium (Na) has an atomic number of 11, so it has 11 protons.

Step5: Look up barium

Barium (Ba) has an atomic number of 56, so it has 56 protons.

Step6: Look up carbon

Carbon (C) has an atomic number of 6, so it has 6 protons.

Step7: Look up calcium

Calcium (Ca) has an atomic number of 20, so it has 20 protons.

Step8: Look up chromium

Chromium (Cr) has an atomic number of 24, so it has 24 protons.

Step9: Look up mercury

Mercury (Hg) has an atomic number of 80, so it has 80 protons.

Step10: Look up iron

Iron (Fe) has an atomic number of 26, so it has 26 protons.

Step11: Look up copper

Copper (Cu) has an atomic number of 29, so it has 29 protons.

Step12: Look up francium

Francium (Fr) has an atomic number of 87, so it has 87 protons.

Step13: Look up phosphorous

Phosphorus (P) has an atomic number of 15, so it has 15 protons.

Step14: Look up aluminum

Aluminum (Al) has an atomic number of 13, so it has 13 protons.

Step15: Look up potassium

Potassium (K) has an atomic number of 19, so it has 19 protons.

Step16: Look up hydrogen

Hydrogen (H) has an atomic number of 1, so it has 1 proton.

Step17: Look up nickel

Nickel (Ni) has an atomic number of 28, so it has 28 protons.

Step18: Look up platinum

Platinum (Pt) has an atomic number of 78, so it has 78 protons.

Step19: Look up tin

Tin (Sn) has an atomic number of 50, so it has 50 protons.

Step20: Look up bromine

Bromine (Br) has an atomic number of 35, so it has 35 protons.

Step21: Look up boron

Boron (B) has an atomic number of 5, so it has 5 protons.

Step22: Look up tennessine

Tennessine (Ts) has an atomic number of 117, so it has 117 protons.

Step23: Look up nihonium

Nihonium (Nh) has an atomic number of 113, so it has 113 protons.

Step24: Look up moscovium

Moscovium (Mc) has an atomic number of 115, so it has 115 protons.

Step25: Look up oganesson

Oganesson (Og) has an atomic number of 118, so it has 118 protons.

Answer:

magnesium: 12 zinc: 30 sodium: 11 barium: 56 carbon: 6 calcium: 20 chromium: 24 mercury: 80 iron: 26 copper: 29 francium: 87 phosphorous: 15 aluminum: 13 potassium: 19 hydrogen: 1 nickel: 28 platinum: 78 tin: 50 bromine: 35 boron: 5 tennessine: 117 nihonium: 113 moscovium: 115 oganesson: 118