28 Questions
What is an element according to the text?
A pure substance made of only one type of atom
Why is water not considered an element?
Because water can be broken down into other substances
How are elements different from each other?
By the properties of the atoms they are made of
Why are elements compared to letters combining to form words in the text?
To illustrate the diversity and combinations possible with elements
What differentiates chemicals from elements?
Chemicals are mixtures of elements, while elements are pure substances
What are atoms made of according to the text?
Subatomic particles like electrons and protons
How is an atom typically structured?
With a dense center and an outer, nearly empty zone around it
What are the 3 main components found in an atom's nucleus?
Protons, electrons, and neutrons
Which element has 2 protons, 2 electrons, and 2 neutrons?
Helium
What determines the reactivity of an element and many of its properties?
The number of electrons in the electron cloud
What is the lightest and most abundant element in the universe?
Hydrogen
Why are hydrogen and helium, despite similar protons and electrons, different in stability?
Due to having different numbers of neutrons
Which category of elements on the Periodic Table are typically solid at room temperature and good conductors of electricity?
Metals
Why are non-metal elements described as dull and brittle?
Due to being poor conductors of heat and electricity
Why is water not considered an element?
Water consists of multiple types of atoms.
How are elements different from chemicals according to the text?
Elements are made of one kind of atom, while chemicals can be compounds.
What do elements combine to form, according to the text?
Compounds
What do atoms consist of, based on the text?
Protons, neutrons, and electrons
Why are elements compared to letters combining to form words in the text?
To emphasize their unique properties
What determines if something is considered matter according to the text?
Whether it can be broken down into other substances
Why are elements described as pure substances according to the text?
They consist of only one type of atom
What is the location of protons and neutrons in an atom?
Nucleus
Which element is described as typically a solid and highly reactive?
Lithium
Why are hydrogen and helium mentioned as different despite their similar proton and electron numbers?
Helium is highly reactive while hydrogen is stable
What determines the reactivity of an element and many of its properties?
Number and location of electrons
Why are non-metal elements described as poor conductors of heat and electricity?
Lack of free-moving electrons
What makes each element unique?
The number of protons
How many natural elements are known to scientists?
92
Learn about elements in science, which are pure substances made of only one type of atom. Discover how elements differ from compounds and cannot be broken down further into other substances. Explore examples like hydrogen and oxygen as elements, and understand why compounds like water do not qualify as elements.
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