WorksheetsChemical Properties
Total questions: 14
Worksheet time: 8mins
Electrons fill the __________ energy level first.
highest
lowest
How many valence electrons does Aluminum (Al) have?
(a)
The atoms of a certain element each contain 36 protons and 8 valence electrons. Which statement correctly identifies this element and describes its chemical reactivity?
The element is krypton, Kr, and it is not very reactive.
The element of is chlorine, Cl, and it is highly reactive.
The element is krypton, Kr, and it is highly reactive.
The element is chlorine, Cl, and it is not very reactive.
In the periodic table, elements have the same number of valence electrons are placed in the same column, called a __________.
period
group
Elements that have the same number of energy levels in their electron clouds are placed in the same row, which is called a __________.
period
group
The shaded regions in the periodic table show four sets of elements. Which set of elements includes mostly elements that do not react readily.
Set W
Set X
Set Y
Set Z
Beryllium, Be, is a strong, lightweight metal. It is used as a component for satellites and spacecraft. Which statement correctly describes atoms of beryllium?
Beryllium atoms have 4 protons.
Beryllium atoms have 9 neutrons.
Beryllium atoms have 6 electrons.
Beryllium atoms have 4 valence electrons.
These models show an atom for each of two different elements. Which difference between the atoms makes them different elements.
The fluorine atom has 9 protons, and the sodium atom has 11 protons.
The fluorine atom has 10 neutrons, and the sodium atom has 12 neutrons.
The fluorine atom has 2 energy levels, and the sodium atom has 3 energy levels.
The fluorine atom has 7 valence electrons, and the sodium atom has 1 valence electron.
Element X has an atomic number of 14. Element Y has an atomic number of 12. Which statement about Elements X and Y is NOT correct?
Element X has 4 valence electrons.
Element X has the same symbol as Element Y.
Element Y has 2 valence electrons.
Element Y is more reactive than Element X.
The diagrams show atoms of four different elements. Which two elements are likely to react with other chemicals in similar ways?
Elements 1 and 3
Elements 1 and 4
Elements 2 and 3
Elements 2 and 4
What do all the elements in Group 18 of the periodic table have in common?
They all are solids with a high density.
They all have 8 protons and 8 electrons.
They all have a complete outer energy level.
They all react quickly with Group 1 elements.
This is a portion of the periodic table. The number to the left of each row represents the number of --
protons in atoms of the first element in the row
valence electrons in the atoms of each element in the row
compounds that each element in the row will form
energy levels in the atoms of each element in the row
Based on their location on the periodic table, which two elements are likely to have the most similar reactivity?
Neon and sodium
Oxygen and fluorine
Phosphorus and carbon
Potassium and rubidium
Four elements are labeled on the periodic table shown below. Which description matches the locations of these elements on the periodic table?
Elements 1 and 2 are metals, and elements 3 and 4 are nonmetals.
Element 1 is a metalloid, element 2 is a chemically stable gas, and elements 3 and 4 are metals.
Element 1 is a reactive metal, elements 2 and 3 are chemically stable gases, and element 4 is a metalloid.
Elements 1 and 4 are chemically stable metals, element 2 is a metalloid, and element 3 is a reactive gas.
