Questions and Answers
What substances make up water?
H2O, hydrogen for every oxygen pure substances.
What substances make up an iron pot?
Iron.
What is an element?
Elements are pure substances that are made up of one kind of atom.
What 2 kinds of atom does water contain?
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Is iron an element?
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What are atoms?
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What causes the element name to change?
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What does it mean when an atom is ionized?
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Which particle changes the name of the atom?
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Which particle changes whether the atom is stable or not?
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Which particle changes whether the atom is ionized or not?
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When the number of protons equals the number of electrons, the atom is...?
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When the number of protons is not equal to the number of electrons, the atom is...?
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The number of protons in the nucleus is called the...?
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Study Notes
Composition of Water and Iron
- Water is composed of H2O, consisting of two hydrogen atoms for every one oxygen atom.
- An iron pot is made solely of iron, which is an element.
Understanding Elements
- Elements are defined as pure substances made up of a single type of atom.
- Iron qualifies as an element because it contains only one kind of atom.
Atomic Structure
- Atoms are the fundamental particles of matter consisting of protons, neutrons, and electrons.
- The number of protons in an atom determines its element identity; changing the number of protons alters the element.
Ionization and Stability
- An atom is ionized when the number of electrons does not equal the number of protons, resulting in a charged atom.
- The stability of an atom can be influenced by neutrons; changes in the number may lead to instability in certain conditions.
Key Particles in Atoms
- Protons are responsible for the identity of the element and changes in their number change the name of the atom.
- Neutrons contribute to the overall mass of the atom and affect stability, while electrons impact the ionization state.
Summary of Atomic Relationships
- When the number of protons equals the number of electrons, the atom is neutral.
- When these numbers are not equal, the atom is ionized, indicating it has a charge.
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Description
Test your knowledge of basic chemistry concepts, including the composition of water and elements. This quiz covers fundamental definitions and examples that are essential for understanding substances in chemistry.
