Chemistry: Atomic Structure Flashcards
When did John Dalton publish his ideas on atoms?
1803
What does Dalton’s model state about atoms?
Atoms cannot be broken down into anything simpler.
How are the atoms of a given element described in Dalton’s model?
The atoms of a given element are identical to each other.
How do atoms of different elements compare according to Dalton’s model?
The atoms of different elements are different from one another.
What happens to atoms during chemical reactions according to Dalton’s model?
During chemical reactions, atoms rearrange to make different substances.
Why has Dalton’s model changed over time?
The model has changed because of the discovery of subatomic particles.
What are the three smaller particles that atoms can be broken down into?
Atoms can be broken down into protons, neutrons, and electrons.
Do atoms of an element have identical numbers of protons and electrons?
Yes, atoms of an element have identical numbers of protons and electrons, but can have different numbers of neutrons.
Do atoms of different elements have the same number of protons and electrons?
No, atoms of different elements have different numbers of protons and electrons.
What is the size comparison between the nucleus and the atom?
The nucleus is very small compared to the atom as a whole.
What occupies most of an atom’s volume?
Most of an atom is empty space, as electrons are even smaller than the nucleus.
How does the diameter of a nucleus compare to that of an atom?
The diameter of a nucleus can be 100,000 times less than the diameter of an atom.
Relative mass and relative charge of a proton?
Has a relative mass of 1 and a relative charge of +1
Relative mass and relative charge of a neutron
Has a relative mass of 1 and a relative charge of 0
Relative mass and relative charge of an electron
Has a relative mass of 1/1835 and a relative charge of -1
