Answer: Here are the first 40 elements along with their atomic numbers and symbols:
- H – Hydrogen (1)
- He – Helium (2)
- Li – Lithium (3)
- Be – Beryllium (4)
- B – Boron (5)
- C – Carbon (6)
- N – Nitrogen (7)
- O – Oxygen (8)
- F – Fluorine (9)
- Ne – Neon (10)
- Na – Sodium (11)
- Mg – Magnesium (12)
- Al – Aluminum (13)
- Si – Silicon (14)
- P – Phosphorus (15)
- S – Sulfur (16)
- Cl – Chlorine (17)
- Ar – Argon (18)
- K – Potassium (19)
- Ca – Calcium (20)
- Sc – Scandium (21)
- Ti – Titanium (22)
- V – Vanadium (23)
- Cr – Chromium (24)
- Mn – Manganese (25)
- Fe – Iron (26)
- Co – Cobalt (27)
- Ni – Nickel (28)
- Cu – Copper (29)
- Zn – Zinc (30)
- Ga – Gallium (31)
- Ge – Germanium (32)
- As – Arsenic (33)
- Se – Selenium (34)
- Br – Bromine (35)
- Kr – Krypton (36)
- Rb – Rubidium (37)
- Sr – Strontium (38)
- Y – Yttrium (39)
- Zr – Zirconium (40)
Explanation: Each element is listed with its chemical symbol and atomic number, which represents the number of protons in the nucleus of an atom of that element.