(Blank)
What is the element with the lowest mass?
hydrogen
What is the element symbol for oxygen?
O(oxygen)
The second lightest element after hydrogen
Helium (He)
A general term for materials that are composed of protons, electrons, and neutrons
element
Does shell 2 contain electrons?
8 electrons
What is very heavy and is used as fuel for nuclear power generation?
Uranium (U).
What is the heaviest alkali metal?
Francium (Fr)
What determines the atomic number？
Number of protons
Who invented the periodic table?
Mendeleev
What is the heaviest element in Group 13?
Nihonium（Nh）
What metallic element is most symbolically found in bananas?
Potassium (K)
Which of the Group 18 (noble gases) is most abundant in air?
Argon (Ar)
Names of 18 stable and unreactive groups.
noble gases
Which of the 17 tribes has the strongest reaction?
Fluorine (F)
What is the most abundant element on Earth?
Iron (Fe)
What makes up about 80% of air?
Nitrogen (N)
What do the horizontal rows of the periodic table represent?
period
Which alkali metal is the most reactive?
Cesium (Cs)
What are the similarities between members of the same family and why?
They have similar chemical properties because they have the same number of outermost electrons.
Currently the most massive element
Oganesson (Og)
What happens when a neutrino collides with a hydrogen atom?
The protons will turn into "neutrons" and we will be looking at the positrons.
What is the half-life of uranium (²³⁸U)?
Approximately 45 billion years
What is the half-life of oganesson (Og)?
Approximately 0.00089 seconds.
The amount of tritium present in nature
The total amount worldwide is only about 3kg to 7.3kg.
Probability of natural neutrinos interacting with matter
The probability of a collision is about one in tens of billions of objects passing by Earth.