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WorksheetsAtoms and the Periodic Table (8.5A - 8.5B - 8.5C)
Total questions: 15
Worksheet time: 27mins
Looking at the Bohr model for Argon (Ar). How many energy levels does it have and number of valence electrons?
This Bohr model of Argon (Ar) shows that Argon has a
(a) energy levels and (b) valence electrons.
Which 2 characteristics describe neutrons?
neutral charge
located in the nucleus
negative charge
positive charge
located in the electron cloud
Which 2 characteristics describe protons?
neutral charge
located in the nucleus
negative charge
positive charge
located in the electron cloud
Which 2 characteristics describe electrons?
neutral charge
located in the nucleus
negative charge
positive charge
located in the electron cloud
An atom of a certain element has 11 electrons, and a mass number of 23. This element is very reactive in room temperature. How many neutrons are in this atom?
11
12
33
23
Use the element tile for Sulfur (S) to match the elements with their correct label.
Element Name
S
16
Mass Number
32
Element Symbol
Sulfur
Protons, Neutrons & Electrons are examples of
subatomic particles
valence electrons
elements
The smallest particle of an element; made of electrons, protons, and neutrons
valence electron
electron cloud
atomic mass
atom
Use the periodic table to match the element with its description.
Tin (Sn)
8 valence electrons and 3 energy levels
Argon (Ar)
group 14 and period 5
Hydrogen (H)
1 valence electron and mass number 1
Barium (Ba)
halogen with 4 energy levels
Bromine (Br)
alkali earth metal with 56 protons
A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The 2 valence electrons in each atom of calcium
The atomic mass of calcium, which is 40.078 amu
The density of calcium, which is 1.54 g/cm3
A chemist is identifying the elements present in a sample of seawater. What characteristic of an element’s atoms always determines the element’s identity?
The number of neutrons
The number of protons
The location of valence electrons
The number of valence electrons
What reasonable conclusion can be made from the information given?
Element 1 has the same atomic mass as Element 4
Element 3 has very similar chemical properties as Element 4
Element 1 has very similar chemical properties as Element 3
None of the above
Tin (Sn) is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?
Tin atoms have 50 protons.
Tin atoms have five valence electrons.
Tin atoms have 119 neutrons.
Tin atoms have 68 electrons.
Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.
Based on the data, which periodic table shows the correct location of the four elements?
