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Atomic Structure Quiz
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What is the atomic number of carbon?
6
Which element has the atomic number 79 and is known for its use in jewelry?
Gold (Au)
What are metalloids?
Elements with properties that are intermediate between metals and non-metals (e.g., silicon, boron).
How is the periodic table arranged?
In order of increasing atomic number.
What do elements in the same period of the periodic table have in common?
They have the same number of electron shells.
What do elements in the same period of the periodic table have in common?
They have the same number of electron shells.
Name the transition metals found in the middle of the periodic table.
Elements from groups 3 to 12
What are the elements found in Group 17 (VII A) called?
Halogens (e.g., fluorine, chlorine)
Which element is always found in Group 18 (VIII A) of the periodic table?
Noble gases (e.g., helium, neon, argon)
What is the significance of the group number on the periodic table?
It indicates the number of valence electrons in the elements of that group.
In the periodic table, which group contains the alkali metals?
Group 1 (I A)
What is an ion?
An atom or molecule with an unequal number of protons and electrons, resulting in a charge.
How do you calculate the number of neutrons in an atom?
Subtract the atomic number from the mass number.
Define Isotope
Atoms of the same element with different numbers of neutrons.
What is the atomic mass of an element?
The weighted average of the masses of an element's isotopes.
How many protons, neutrons, and electrons are in an atom with an atomic number of 12 and a mass number of 24?
12 protons, 12 neutrons, 12 electrons
In Rutherford's atomic model, where is most of the atom's mass located?
In the nucleus
What experiment led Ernest Rutherford to propose the nuclear model of the atom?
The Gold Foil Experiment
Which subatomic particle did J.J. Thomson discover?
Electron
Which atomic model introduced the concept of electrons orbiting the nucleus in energy levels or shells?
Niels Bohr
Who proposed the first atomic model with indivisible atoms?
John Dalton