WorksheetsSemester 2 Science - Chemistry
Total questions: 20
Worksheet time: 10mins
What two majors can Chemistry be said to be between?
Physics and Mathematics
Biology and Mathematics
Biology and Physics
Physics and Information Technology
All stuff is made from what?
Cells
Atoms
Cell Nuclei
Carbon
Who mathematically proved that atoms exist in 1905?
Robert Brown
Albert Einstein
Dmitri Mendeleev
Antoine Lavoisier
What is the Greek word and meaning of the word "atom"?
Smallest
Unbreakable
Tiny
Indivisible
What are the three key subatomic particles for atoms?
Nucleus, Neutrons, Protons
Quarks, Electrons, Protons
Electrons, Neutrons, Nucleus,
Neutrons, Protons, Electrons
The number of _______ in an element is its atomic number
Neutrons
Protons
Electrons
Quarks
What element has 79 protons?
Praseodymium
Silver
Gold
Carbon
What is the chemical symbol for silver?
Au
Ag
Si
Sv
According to the video, what is the "soul of the atom"?
The atomic number
The atomic weight
The chemical symbol
The electron
Relative Atomic Mass, for example for silver, isn't a whole number because..
of electrons
it averages the total nucleons of all of the isotopes
Brownian motion changes the mass
of quarks
What is the atomic number (and number of protons) of silver?
6
47
59
79
When two sorts of elements--for example two sorts of silver--have different masses but the same chemical properties, they are called...
Relative Atomic Mass
Isotopes
Quarks
Atoms
The mass number is the total number of ___________ in the nucleus
Electrons and Protons
Protons and Neutrons
Neutrons and Electrons
Nuclei
Which is the smallest, the nucleus, the proton, the neutron or the electron?
The nucleus
The proton
the neutron
the electron
Silver often has how many neutrons?
40
50
60
70
What is the Brownian motion?
Brownian motion is when grains of pollen move about in a random way
Brownian motion is when pollen grains move about in space due to random movements of protons
Brownian motion is when pollen grains bump into each another due to neutrons
Brownian motion is a motion caused by random movements of atoms
What is holding together the nucleus of the atom?
The bosons, hadrons and fermions
The weak nuclear force
The strong nuclear force
The subatomic particles
Why don't neutrons change the properties of an atom?
Because they are not heavy enough to change the properties of the atom
Because they don't have any charge
Because they are not stable enough
Because they are not big enough to change the properties of the atom
What are neutrinos?
Neutrinos are subatomic particles with positive electrical charge and significant mass
Neutrinos are subatomic particles with insignificant mass and no electrical charge
Neutrinos are part of the protons with positive electrical charge with insignificant mass
Neutrinos are part of the neutrons with negative electrical charge and a significant mass
Why isotopes of the same chemical element are different, but have the same position in the periodic table?
Because they don't have the same atomic number, and differ in mass number because of different number of protons in their nuclei
Because they don't have the same atomic number, and they have the same mass number due to the neutrons in their nuclei
They have the same atomic number, but differ in mass number because of different number of neutrons in their nuclei
They have the same atomic number, but differ in mass number because of different number of protons in their nuclei
