Presentation on theme: "Basic Periodic Table. Atomic Number The atomic number is always the smaller number on the element’s box. The atomic number always equals the number of."— Presentation transcript:
Atomic Number The atomic number is always the smaller number on the element’s box. The atomic number always equals the number of protons or electrons. For the element to the right, what would the atomic number be?
Symbol The symbol in an elements box is always a letter or two The symbol will either have one capital letter, or one capital letter and one lowercase letter Which is the symbol here?
Name In an elements box, there will always be a name The name is always what the element is called What’s the name here?
Mass Number The mass number equals the number of protons plus neutrons The mass number is the bottom number of an elements box, and will always be the bigger number What’s the mass number here?
Calculating Protons, Neutrons, and Electrons The atomic number is the number of protons in an atom of an element To find the number of electrons in an element, you just look at the protons. The number of protons and electrons will always be the same or congruent Congruent means equal! To find the number of neutrons in an element, you subtract the atomic number from the mass number. If the mass number or the atomic number is a decimal, you will round to the nearest whole number
Example 8, is the atomic number and 16 is the mass number The number of protons and electrons would be 8 The mass number would be 8 too, because if you subtract 8 from 16 you still get 8!
Quiz! 1.The atomic number equals A protons and electrons B protons and neutrons C blue and yellow 2.The mass number equals A protons and electrons B protons and neutrons C cats and dogs 3.To find the number of neutrons you.. A add monkeys and bananas B subtract the atomic number from the mass number C add the atomic number to the mass number 4.The symbol is.. A is the elements name B the atomic number C is the letter or two in an atom, and the first letter is always the capital letter if there are two letters 5.The elements name is.. A is the symbol B is the atomic number C the elements name