Subatomic Particles
This particle has a negative charge.
What is an electron?
This scientist was the first to suggest the idea that an atom existed.
Who is Democritus?
This atom has an atomic number of 18.
What is Argon?
The small dense center of the atom.
What is the nucleus?
This energy level can hold eight electrons.
What is the second energy level?
This particle has a positive charge.
What is a proton?
This scientist performed his gold foil experiment, which led to the discovery of a positively charged nucleus.
Who is Rutherford?
This element has 37 electrons in its neutral state.
What is Rubidium?
This is the large section of the atom where electrons are likely to be found.
This energy level can hold 18 electrons.
What is the third energy level?
This particle has no charge.
What is a neutron?
What is the plum pudding model?
An atom has a mass number of 80, and it has 37 neutrons. How many protons does it have?
What is 43?
This is the number of electrons the third energy level is able to hold.
This is the part of the atom that takes up the most space.
Knowing the amount of these particles allows us to determine the identity of the element.
What are protons?
This model was discovered by Dalton and he said the atom was a solid ball that did not have any smaller particles.
What is the solid sphere model?
An atom has 25 protons, 30 neutrons, and 25 electrons. Find the mass number?
What is 55?
These electrons are found in the outer energy level of the atom.
What are valence electrons?
An atom has 9 protons, 9 electrons, and 11 neutrons. What is the mass?
The mass is 20.
These two particles added together give us our mass number.
What are protons and neutrons?
This scientist decided that the periodic table should be arranged by atomic number.
Who is Mosely?
An atom of an element has 13 electrons and 17 neutrons. This atom would be what element?
What is aluminum?
These subatomic particles are found in the nucleus.
What are protons and neutrons?
An atom that has 22 electrons will have how many energy levels in its electron cloud?
What is three energy levels?