Scientists & Discoveries
Which scientist proposed that atoms were indivisible, solid spheres?
What is John Dalton?
Which atomic model described the atom as a solid, indivisible sphere?
What is Dalton's model?
Which subatomic particle has a positive charge?
What is proton?
Which subatomic particle is located outside the nucleus and is involved in chemical interactions?
What is the number of protons?
According to Bohr's model, electrons occupy specific regions called what?
What is energy levels?
Which scientist discovered evidence that atoms contain negatively charged particles by studying a glowing beam?
What is JJ Thomson?
Which atomic model is known as the "plum pudding model"?
What is Thomson's model?
Which subatomic particle has a negative charge?
What is electron?
What two particles are added together to determine an atom's mass number?
What is protons & neutrons?
What happens when an electron absorbs energy?
What is it moves to a higher energy level?
Which scientist's atomic model states that an atom is mostly empty space with a small, dense nucleus?
What is Ernest Rutherford's?
Which model proposed that the atom is mostly empty space with a small, dense nucleus?
What is Rutherford's model?
Which subatomic particle has no charge?
What is neutron?
Atoms of the same element that have different numbers of neutrons are called what?
What is isotopes?
What happens when an electron releases energy?
What is it moves to a lower energy level?
Which scientist proposed a model in which electrons move around the nucleus in specific energy levels?
What is Niels Bohr?
Which model proposed that electrons move around the nucleus in specific energy levels?
What is Bohr's model?
Which two subatomic particles have approximately the same mass?
What is protons & neutrons?
An atom has 12 protons and 13 neutrons. What is its mass number?
What is 25?
What is an atom called when its electrons have gained energy and moved to a higher energy level?
What is excited state?
Which scientist discovered the neutron?
What is James Chadwick?
Which modern model describes electrons as being found in regions of probability called electron clouds?
What is electron cloud model?
Which subatomic particle is located outside the nucleus and is involved in chemical interactions?
What is electron?
An atom has an atomic number of 17 and a mass number of 37. How many protons, neutrons, and electrons does a neutral atom have?
What is 17 protons, 20 neutrons, & 17 electrons?
When an electron moves from a higher energy level to a lower energy level, what does it release?
What is energy?