1.1 Particles in the atom and atomic radius

7 of 7 objectives have lessons · 0 studied · 0 secure

Lessons

Protons, neutrons and electronsWhat an atom is made of, where its mass and charge are, and how to count protons, neutrons and electrons in any atom or ion. 5 min, not started
Particle beams in an electric fieldHow beams of protons, neutrons and electrons at the same velocity are deflected between charged plates, and why the electron beam bends most. 4 min, not started
Atomic and ionic radius trendsWhy atoms shrink across a period and grow down a group, and how the sizes of positive and negative ions compare. 5 min, not started

Syllabus objectives

7 objectives

What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.

1.1.1

Understand that an atom is mostly empty space around a very small, dense nucleus containing protons and neutrons, with electrons found in shells in the empty space around the nucleus.

Taught in: Protons, neutrons and electrons · 1 question

1.1.2

Identify and describe protons, neutrons and electrons in terms of their relative charges and relative masses.

Taught in: Particle beams in an electric field, Protons, neutrons and electrons · 3 questions

1.1.3

Understand the terms atomic number and proton number; mass number and nucleon number.

Taught in: Protons, neutrons and electrons · 1 question

1.1.4

Describe how mass and charge are distributed within an atom.

Taught in: Protons, neutrons and electrons · 1 question

1.1.5

Describe the behaviour in an electric field of beams of protons, neutrons and electrons moving at the same velocity.

Taught in: Particle beams in an electric field · 5 questions

1.1.6

Determine the numbers of protons, neutrons and electrons in both atoms and ions, given the atomic (proton) number, mass (nucleon) number and charge.

Taught in: Protons, neutrons and electrons · 3 questions

1.1.7

State and explain qualitatively how atomic radius and ionic radius vary across a period and down a group.

Taught in: Atomic and ionic radius trends · 6 questions