Physical Math
100 cm to meters
1 meter
Who proposed the first atomic theory, and what were its main ideas?
Democritus
What are the three subatomic particles that make up an atom?
Protons, neutrons, and electrons.
How many protons, neutrons, and electrons are in a stable Hydrogen atom?
1 proton, 1 electron and 0 neutrons
What is the force that pulls objects towards the Earth?
Gravity
5 in to cm
1 in = 2.54cm
12.7 cm
How did J.J. Thomson's experiments with cathode rays lead to the discovery of the electron?
Thomson's experiments showed that cathode rays were made up of negatively charged particles, which he named electrons.
How do protons, neutrons, and electrons are different to each other?
Protons +, Electrons -, Neutrons 0
How many protons, neutrons, and electrons are in a stable helium atom?
2 proton, 2 electron and 2 neutrons
What are the 3 main states of matter?
Liquid, Gas, and Solid
What's the mathematical expression for x10^6
Mega
What was Ernest Rutherford's gold foil experiment, and what did it reveal about the structure of the atom?
Rutherford's experiment involved firing alpha particles at a thin gold foil. Most particles passed through, but a few were deflected, suggesting that the atom has a small, dense nucleus.
What is the difference between atomic number and atomic mass?
Atomic number is the number of protons in an atom, while atomic mass is the approximate total mass of protons and neutrons in an atom.
How many protons, neutrons, and electrons are in a stable carbon atom?
6 protons, 6 neutrons, and 6 electrons.
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transferred or transformed.
What's the mathematical expression for x10^-3
Milli
How did Niels Bohr's model of the atom incorporate the concept of energy levels?
Bohr's model proposed that electrons orbit the nucleus in specific energy levels, or shells.
What is an isotope, and how do isotopes of the same element differ?
Isotopes are atoms of the same element with different numbers of neutrons. They have the same atomic number but different atomic masses.
How many protons, neutrons, and electrons are in a stable titanium atom?
22 proton, 22 electron and 26 neutrons
What is the unit of measurement for force?
Newton (N)
What's the mathematical expression for x10^-6
Micro
Who discovered the nucleus of the atom?
Ernest Rutherford discovered the nucleus of the atom in his gold foil experiment.
How does the arrangement of electrons in energy levels influence the chemical properties of an element?
The number of electrons in the outermost energy level determines the element's reactivity and chemical bonding properties.
How many protons, neutrons, and electrons are in a stable bohrium atom?
107 proton, 107 electron and 163 neutrons
What is the formula for calculating speed?
Speed = Distance / Time