Chemistry: First 20 Elements Flashcards

First 20 Elements Overview

• Hydrogen (H): Simplest element with 1 proton, 1 electron, and no neutrons.
• Helium (He): Light noble gas consisting of 2 protons, 2 electrons, and 2 neutrons.
• Lithium (Li): Alkali metal featuring 3 protons, 3 electrons, and 4 neutrons.
• Beryllium (Be): Alkaline earth metal with 4 protons, 4 electrons, and 5 neutrons.
• Boron (B): A metalloid comprising 5 protons, 5 electrons, and 6 neutrons.
• Carbon (C): Fundamental element for life, consisting of 6 protons, 6 electrons, and 6 neutrons.
• Nitrogen (N): Essential component of amino acids; has 7 protons, 7 electrons, and 7 neutrons.
• Oxygen (O): Vital for respiration; contains 8 protons, 8 electrons, and 8 neutrons.
• Fluorine (F): Reactive halogen with 9 protons, 9 electrons, and 10 neutrons.
• Neon (Ne): Inert noble gas with 10 protons, 10 electrons, and 10 neutrons.

Continued Element Breakdown

• Sodium (Na): An alkali metal featuring 11 protons, 11 electrons, and 12 neutrons.
• Magnesium (Mg): An alkaline earth metal with 12 protons, 12 electrons, and 12 neutrons.
• Aluminium (Al): Common metal comprising 13 protons, 13 electrons, and 14 neutrons.
• Silicon (Si): A key semiconductor material with 14 protons, 14 electrons, and 14 neutrons.
• Phosphorus (P): Important for DNA and energy transfer; contains 15 protons, 15 electrons, and 16 neutrons.
• Sulfur (S): Essential for certain amino acids, featuring 16 protons, 16 electrons, and 16 neutrons.
• Chlorine (Cl): Reactive halogen with 17 protons, 17 electrons, and 18 neutrons.
• Argon (Ar): A colorless noble gas with 18 protons, 18 electrons, and 22 neutrons.
• Potassium (K): Key mineral for biological functions; includes 19 protons, 19 electrons, and 20 neutrons.
• Calcium (Ca): Crucial for bones and teeth, comprising 20 protons, 20 electrons, and 20 neutrons.

Explore the basics of the first 20 elements in this chemistry quiz. Each card provides essential information including the number of protons, electrons, and neutrons for each element. Perfect for students looking to enhance their understanding of atomic structure.