Periodic Table: 1-57; 72-89

The correct chemical symbol for hydrogen is H, not He (Helium), O (Oxygen), or C (Carbon).

The atomic number of an element corresponds to the number of protons found in the nucleus of an atom of that element. In the case of Helium, the correct atomic number is 2, meaning it has 2 protons in its nucleus.

The correct chemical symbol for lithium is Li, with atomic number 3.

The chemical symbol for Beryllium is 'Be', not 'B', 'Br', or 'Ba'.

The atomic number of Boron is 5, which identifies the element uniquely based on the number of protons in its nucleus.

The atomic number of an element indicates the number of protons in the nucleus of an atom of that element. In the case of Carbon, the atomic number is 6.

The correct chemical symbol for nitrogen is N. It is a chemical element with atomic number 7.

The correct chemical symbol for oxygen is 'O', as it is the eighth element on the periodic table. Au represents gold, Na represents sodium, and H represents hydrogen.

The correct answer is 9-Fluorine as it is the element commonly represented by the letter F in the periodic table.

The correct chemical symbol for Neon is Ne. Sodium has the chemical symbol Na, Nickel has the chemical symbol Ni, and Nubium does not exist as an element.

The correct chemical symbol for sodium is Na, which comes from the Latin word 'natrium'.

The correct chemical symbol for Magnesium is Mg, not Ma, Mn, or Mo.

The chemical symbol for Aluminum is Al and its atomic number is 13, making the correct answer 13-Aluminum. The incorrect answers provided are the chemical symbols for Silicon (Si), Copper (Cu), and Silver (Ag) respectively.

The correct chemical element symbol for Silicon is Si, not Sl, Sc, or Sa.

The correct chemical symbol for Phosphorus is 15-P. The incorrect options do not match the correct chemical symbol for Phosphorus.

The chemical symbol 'S' represents the element sulfur on the periodic table. Silver is represented by 'Ag', Sodium by 'Na', and Silicon by 'Si'.

The chemical symbol 'Cl' corresponds to the element Chlorine, which has an atomic number of 17 on the periodic table.

The symbol 'Ar' corresponds to the chemical element Argon with atomic number 18. Argon is a noble gas commonly found in Earth's atmosphere.

The correct answer is Potassium (K) which is a chemical element with the symbol K and atomic number 19. Calcium, Krypton, and Kryptonite are different elements and do not correspond to the symbol K.

The correct chemical symbol for Calcium is Ca, while Cl represents Chlorine, Co represents Cobalt, and Cu represents Copper.

The correct chemical symbol for Scandium is 'Sc'. Chemical symbols are typically derived from the element's name in Latin or another language.

The chemical symbol for Titanium is Ti, derived from the Latin word 'titanium'.

The correct chemical symbol for Vandadium is V, not Va, Vd, or Vo. It is represented by the letter V in the periodic table.

The correct chemical symbol for Chromium is Cr. Other options are not the correct chemical symbol for Chromium.

The correct chemical symbol for Manganese is Mn, not Mg, Mo, or Mc.

The correct chemical symbol for Iron is Fe, not I, Au, or Na. Iron's atomic number is 26 on the periodic table.

The correct answer is Cobalt, which has the atomic number 27. Carbon is represented by the abbreviation C, Copper by Cu, and Chromium by Cr.

The chemical symbol for Nickel is Ni, not Ne, Na, or Nb.

The chemical symbol for Copper is Cu, with atomic number 29. The incorrect answers are the chemical symbols for Cobalt (Co), Zinc (Zn), and Nickel (Ni) respectively.

The chemical symbol for Zinc is Zn, not Zc, Zi, or Zk. It is a transition metal with atomic number 30.