# What do Scientists look like? - The Physics Doctor

Draw a line under last lessons work and write todays title in your book... Inside atoms Learning Outcomes C/W 02/07/202 0 State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols.

Engage Inside atoms State as many differences as you can about the particles shown in the images below. (There are at least 3 differences) Engage Inside atoms Atom has 2 electrons while alpha particle has 0 Atom has a neutral charge, alpha particle is 2+ Atom is bigger than the alpha particle. Explore Subatomic particle Proton

Neutron Electron Complete the relative mass and charge of each sub-atomic particle in the table. Relative mass Relative charge 1 +1

1 0 0.0005 -1 The mass of an atom is almost entirely in the nucleus, so the sub-atomic particles in the nucleus have the greater relative mass. The charge of the proton is positive 1, the electron negative 1 and the neutron, neutral Choose from: 1, 0, 0.0005, +1, -1 Explore

Subatomic particles Protons are positive ones, neutrons are neutral ones, electrons are electric ones. What are nucleons? Nucleus ones! Protons and neutrons Stop and Check Learning Objective By the end of the lesson, you will be able to Learning Outcomes

By the end of the lesson, you will be able to State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols. Explain Mass number OR

nucleon number Every atom can be shown as a symbol two numbers. Atomic number OR proton number Explain The mass number is most of the mass of the atom and equal to the number of nucleons (protons and

neutrons) Number of neutrons = mass number atomic number. How many neutrons are there in carbon? Explain 19 9 = 10 Work out the number of neutrons for 94=5 31 15 = 16 Explain

Atoms of a given element have the same number of protons in the nucleus. This number is unique to that element. Atomic number, or proton number EVERY CARBON ATOM IN THE UNIVERSE HAS 6 PROTONS! Explain If there were more protons

than electrons in an atom, it would be positive. If there were more electrons than protons, the atom would be negative All atoms are neutral, that is they have no overall charge. So they must have an equal number of protons and electrons.

Explain Which atom? Which 2 atoms shown represent the same element? Explain your answer. Explain Which atom? What about the image below shows it is not a real atom? Stop and Check

Learning Objective By the end of the lesson, you will be able to Learning Outcomes By the end of the lesson, you will be able to State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols.

Extend Isotopes are atoms with the same number of protons 35 37 Cl Cl 17 17

but a different number of neutrons. Extend Isotopes have different mass numbers...but the same atomic number 35 37 Cl Cl

17 17 Chlorine-35 Chlorine-37 Extend Isotopes have different mass numbers...but the same atomic number 1

2 3 H H H 1 1 1 hydrogen-1

hydrogen-2 (deuterium) hydrogen-3 (tritium) Extend Carbon has 6 protons. Write the symbols for carbon-13 and carbon14 13 14 C

C 6 6 Carbon-13 Carbon-14 Stop and Check Learning Objective Learning Outcomes By the end of the lesson, you

will be able to By the end of the lesson, you will be able to State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols. Specification

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