Podcast
Questions and Answers
Where are the metalloids on the periodic table?
Where are the metalloids on the periodic table?
between metals and nonmetals
In each box of the periodic table, what does the atomic number at the top represent?
In each box of the periodic table, what does the atomic number at the top represent?
Number of protons
What are the metals found in the middle, lower part of the periodic table called?
What are the metals found in the middle, lower part of the periodic table called?
Transition
Elements with their outermost electrons in the 'D' energy level are ____.
Elements with their outermost electrons in the 'D' energy level are ____.
Elements with their outermost electrons in the 'F' energy level are ____.
Elements with their outermost electrons in the 'F' energy level are ____.
Why does the size of an atom of an element get smaller as you move across a period?
Why does the size of an atom of an element get smaller as you move across a period?
By looking at the visible emissions of electrically excited atoms, how can we tell the type of element present?
By looking at the visible emissions of electrically excited atoms, how can we tell the type of element present?
Where on the periodic table are the elements in the 'P' energy level found?
Where on the periodic table are the elements in the 'P' energy level found?
What are electrons in the outermost energy level called?
What are electrons in the outermost energy level called?
The smallest complete unit of matter is:
The smallest complete unit of matter is:
Who came up with the concept of the Periodic Table?
Who came up with the concept of the Periodic Table?
Which of the following elements is a liquid at just above room temperature?
Which of the following elements is a liquid at just above room temperature?
In the chemical formula, H2O, what does the number 2 represent?
In the chemical formula, H2O, what does the number 2 represent?
There are no zeros in chemistry, so if you consider the formula for water, H2O how many oxygen atoms are present?
There are no zeros in chemistry, so if you consider the formula for water, H2O how many oxygen atoms are present?
What are the gases, on the right of the periodic table, that do not react with anything called?
What are the gases, on the right of the periodic table, that do not react with anything called?
Why don't Noble Gases react?
Why don't Noble Gases react?
The number of electrons in an atom's outer shell is the number of ______ electrons it has.
The number of electrons in an atom's outer shell is the number of ______ electrons it has.
Where are periods on the Periodic Table?
Where are periods on the Periodic Table?
What are the groups on the Periodic Table?
What are the groups on the Periodic Table?
Atoms in the same ______ react the same way chemically so that if you know that the formula for Hydrochloric acid is HCl, you can predict that the formula for Hydrofluoric Acid will be HF.
Atoms in the same ______ react the same way chemically so that if you know that the formula for Hydrochloric acid is HCl, you can predict that the formula for Hydrofluoric Acid will be HF.
Each period on the Periodic Table represents ______.
Each period on the Periodic Table represents ______.
Two atoms of carbon with different atomic masses are said to be different ______.
Two atoms of carbon with different atomic masses are said to be different ______.
What is the common name for the mineral and ionic compound NaCl?
What is the common name for the mineral and ionic compound NaCl?
Atoms will continue to react until their ______ electron shell is full.
Atoms will continue to react until their ______ electron shell is full.
What is the symbol for an electron?
What is the symbol for an electron?
The center of an atom is where most of the mass is, what is this area called?
The center of an atom is where most of the mass is, what is this area called?
What two particles are in the center of an atom?
What two particles are in the center of an atom?
Typically, what can be said about the number of protons and electrons in an atom?
Typically, what can be said about the number of protons and electrons in an atom?
What do the letters, usually one or two, in each box on the periodic table represent?
What do the letters, usually one or two, in each box on the periodic table represent?
What is the number at the bottom of each box on the periodic table?
What is the number at the bottom of each box on the periodic table?
What is the only part of an atom to bond to other atoms?
What is the only part of an atom to bond to other atoms?
What is the following statement? 'When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.'
What is the following statement? 'When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.'
What is the magic number?
What is the magic number?
Where are metals found on the periodic table?
Where are metals found on the periodic table?
Where are the protons located?
Where are the protons located?
How to find the amount of neutrons?
How to find the amount of neutrons?
Why does the atomic radius of elements vary as you go from left to right on the periodic table?
Why does the atomic radius of elements vary as you go from left to right on the periodic table?
Why are atoms made up of mostly empty space?
Why are atoms made up of mostly empty space?
How to do the chemical formula
How to do the chemical formula
Drawing an atom
Drawing an atom
Study Notes
Metalloids and Element Groups
- Metalloids are located between metals and nonmetals on the periodic table.
- Transition metals are found in the middle and lower part of the periodic table and have their outer electrons in the "D" energy level.
- Inner transition elements possess their outermost electrons in the "F" energy level.
- Noble gases, located on the right, are chemically inert due to full outer electron shells.
Atomic Structure and Properties
- The atomic number at the top of each box indicates the number of protons in an atom.
- Atoms consist mainly of empty space, with a dense nucleus made of protons and neutrons at the center.
- The outermost electrons are referred to as valence electrons, influencing chemical reactivity.
- The atomic mass is located at the bottom of each box on the periodic table.
Chemical Formula and Reactions
- In the chemical formula H2O, the "2" signifies two hydrogen atoms, while oxygen is one.
- Chemical reactivity ceases when an atom's outer electron shell is full.
- Atoms react until their outer electron shell is full, following the "Magic Number" concept, which is 8.
- To determine the number of neutrons, subtract the atomic number from the atomic mass.
Periodic Trends
- Atomic size decreases across a period due to increased nuclear charge affecting electrons.
- The number of filled energy shells affects atomic radius; more shells generally mean a larger radius.
- Periods represent rows on the periodic table, indicating energy levels of electrons, while groups are columns that show similar chemical properties.
Key Concepts
- Isotopes are atoms of the same element with differing atomic masses.
- The periodic law states that elements arranged by increasing atomic number display periodic repetitions of properties.
- Bonds between atoms occur through the interaction of electrons, the only part of an atom that can chemically bond.
- Gallium is a unique element that exists as a liquid just above room temperature.
Drawing and Representing Atoms
- When drawing an atom, list protons, neutrons, and electrons; label the nucleus with p and n counts.
- Each energy level can hold the maximum of 2 electrons in the innermost ring, with additional electrons distributed among outer rings.
- The method for writing chemical formulas involves symbol notation and charge balancing to determine the correct ratios of elements.
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Description
Test your knowledge of the periodic table with this engaging quiz! It covers important concepts such as the position of metalloids, the significance of atomic numbers, and the classification of metals. Perfect for chemistry students looking to reinforce their understanding of elemental properties.
