Atoms and Their Charges: Exploring Particles, Symbols, and Isotopes

The video tutorial explains the basic structure of an atom, focusing on protons, neutrons, and electrons. It covers the setup of chemical symbols, atomic numbers, and mass numbers, using potassium as an example. The tutorial differentiates between atomic mass and mass number and introduces the concept of ions, using phosphorus as an example. It explains how to determine if an element is neutral or an ion and provides a method to calculate the number of neutrons and electrons. The video concludes with practice problems and encourages viewers to ask questions.

Which particle in an atom is positively charged?

• Neutron

• Photon

• Electron

• Proton

In a chemical symbol, what does 'Z' represent?

• Mass number

• Atomic number

• Element symbol

• Isotope number

How do you calculate the number of neutrons in an atom?

• Add atomic number and mass number

• Subtract electrons from protons

• Add protons and electrons

• Subtract atomic number from mass number

What is the charge of an ion with more electrons than protons?

• Positive

• Zero

• Neutral

• Negative

What is the atomic number of an element with 15 protons?

• 15

• 30

• 60

• 45

How many electrons does a phosphorus ion with a 3+ charge have?

• 18

• 15

• 21

• 12

If an element has 26 protons and 29 electrons, what is its charge?

• +1

• +3

• -3

• 0

What is the mass number of an element with 26 protons and 30 neutrons?

• 30

• 56

• 26

• 52

Which of the following is true for a neutral atom?

• Neutrons = Electrons

• Protons = Electrons

• Protons > Electrons

• Protons < Electrons

What is the element with atomic number 26?

• Zinc

• Iron

• Copper

• Nickel