GCSE Chem Unit-2 Flashcards
What is an ion?
An atom or molecule that has gained or lost one or more electrons, resulting in a positive or negative charge.
What is an isotope?
Atoms of the same element that have the same number of protons but different numbers of neutrons.
True or False: Isotopes of an element have the same chemical properties.
False
How are ions formed?
By the gain or loss of electrons.
What is a cation?
A positively charged ion.
What is an anion?
A negatively charged ion.
Fill in the blank: Isotopes of an element have the same number of ________ but different numbers of neutrons.
protons
Which subatomic particle is responsible for the chemical properties of an element?
Electrons
What is the atomic number of an element?
The number of protons in the nucleus of an atom of that element.
What is the mass number of an element?
The sum of the number of protons and neutrons in the nucleus of an atom of that element.
How are isotopes of an element represented in chemical notation?
By writing the atomic number followed by the mass number.
What is the charge of an ion with 10 protons and 12 electrons?
2+
How do isotopes of an element differ from each other?
In the number of neutrons in the nucleus.
What is the charge of an ion with 17 protons and 18 electrons?
1-
What is the charge of an ion with 20 protons and 18 electrons?
2+
