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Structure of Atom/Periodic Table Flashcards | StudBud
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Structure of Atom/Periodic Table
Structure of Atom/Periodic Table
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1
According to the periodic table, which of these elements has atoms with the most valence electrons?
radium
argon
potassium
chlorine
2
Look at the section of the periodic table shown below. Which of the following elements is a nonreactive gas?
oxygen
carbon
neon
hydrogen
3
The periodic table shows many characteristics of the elements.
bromine (Br)
Nitrogen (N)
lead (Pb)
hydrogen (H)
4
An uncharged atom has six electrons. The nucleus of this atom must contain _______ protons.
seven
five
six
eight
5
What is the number of electrons for He (Helium)?
2
6
8
4
6
What part of an atom exists in orbitals surrounding the nucleus?
neutron
proton
photon
electron
7
As the period number inceases on the periodic table (moving from the top of the table to the bottom),
the number of the energy level containing the valence electrons increases.
the atomic number increases and the atomic mass decreases.
the number of the energy level containing the valence electrons decreases.
the atomic number decreases and the atomic mass increases.
8
Which of the following elements is a metalloid with moderate reactiviy?
sulfur
sodium
silicon
copper
9
___ and __ are located in the nucleus of the atom, while ____exist in orbitals in the empty space outside of the nucleus
Neutrons; electrons; protons
Protons; neutrons; electrons
Protons; electrons; neutrons
Orbitals; electrons; protons
