Chapter 1 Flashcards
Why is an atom neutral?
This is because the protons and neutrons cancel each other out.
What is the mass number in an atom?
It’s the number of protons/electrons + the number of neutrons
What is the atomic number in an atom?
It’s the number of electrons and protons in the atom
Is the mass number the top number or the bottom number?
It’s the top number.
Is the atomic number the top number or the bottom number?
It’s the bottom number.
What is the definition of an ion?
It is described as an atom which has gained or lost electrons.
Are cations positive or negative ions?
They’re positive.
Are anions positive or negative ions?
They’re negative.
Are electrons positively or negatively charged?
They’re negatively charged.
Fill in the missing word.
When an atom loses electrons it becomes _______ charged.
Positively
Group 1 will want to _____ ___ electron(s) and become a ____ ion
Lose, 1, 1+
Group 3 will want to _____ ___ electron(s) and become a ____ ion
Lose, 3, 3+
How many electrons do group 4 atoms want to lose / gain?
0
Group 5 will want to _____ ___ electron(s) and become a ____ ion
gain, 3, 3-
How many electrons do group 8 atoms want to lose / gain?
0
