Elements — Definition & Overview
Read this topicExplanations 4
- The Periodic Table of Elements An element is an atom or group of atoms that has a specific number of protons in its nucleus. Think of elements as pure. Each element only contain…
By Aaron Lauer, Hannah Bonville, Deena Hauze, Mario Janakis, Alex Federspiel
- Chemical Elements A chemical element is a pure substance that is made of only one type of atom. Elements cannot be broken down into any simpler substance. Each element is unique…
By Deena Hauze, Alex Federspiel, Gabi Slizewska, Mario Janakis
- (Video) Understanding Atoms, Elements, and Molecules by moviestar226 This video by moviestar226 is a great summary of atoms, elements, molecules, and chemical compounds.
By Deena Hauze, Mario Janakis
- (Video) The Genius of Mendeleev's Periodic Table by Lou Serico on TED-Ed This video explains how to understand the periodic table, which is an amazing resource and work of geniu…
By Mario Janakis
Problems 33
- Which of these statements about elements is false?
- Which parts of the picture above represent elements?
- Which parts of the picture above represent elements?
- Carbon, abbreviated C, is located in the second row of the periodic table. What is its atomic number?
- Which element has the atomic number 14?
- What is the name for the horizontal rows on the periodic table?
- What is the name for the vertical columns on the periodic table?
- Which category of elements is found in the right-most group on the periodic table?
- In the periodic table above, which category of elements is pictured in green?
- In the periodic table above, which category of elements is pictured inside the black border?
- Which of the following is NOT a characteristic of metals?
- Which of the following is NOT a characteristic of nonmetals?
- What category of elements is pictured inside the black border?
- Which types of elements are displayed inside the black border?
- Which elements are displayed in the black box?
- What is the name for versions of an element with different numbers of neutrons?
- A certain atom has 17 protons in its nucleus. Which element does this atom correspond to?
- How many valence electrons does nitrogen (N) have?
- A certain atom has 8 protons in its nucleus. What element does this atom correspond to?
- How many valence electrons does sulfur (S) have?
- How do you work out the number of neutrons in an atom of an element?
- Using the periodic table above, which element has the greatest mass?
- A certain molecule is composed of 2 atoms and has a mass of approximately 28 unified atomic mass units. We know one of the atoms is carbon, what is the other one?
- Which of the following is not an element?
- Which of the following is an element?
- A certain molecule is composed only of hydrogen and one other element in a 1:1 ratio. If this molecule has a mass of 78 unified atomic mass units, and is composed only of non-me…
- Which element is the largest?
- A given molecule is composed of carbon and one other element in a 1:4 of carbon to mystery element. If the molecule has a mass of approximately 154 unified atomic mass units, wh…
- Which element is most likely to share chemical properties of oxygen?
- Bronze can be made out of copper. Can silver or gold be created from other elements?
- An element is defined by the number of woah‾\underline{\phantom{woah}}woah it has.
- Most chemical properties of an element are defined by the number of woah‾\underline{\phantom{woah}}woah it has.
- Which of the following is not an element?