Elements and the Periodic Table

Flashcard
•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are nonmetals and where are they located on the periodic table?
Back
Nonmetals are elements that are typically poor conductors of heat and electricity. They are found on the right side of the periodic table.
2.
FLASHCARD QUESTION
Front
What is radioactivity?
Back
Radioactivity is the spontaneous emission of radiation by an unstable atomic nucleus, a term coined by Marie Curie.
3.
FLASHCARD QUESTION
Front
What did Rutherford's gold foil experiment reveal about atomic structure?
Back
It revealed that an atom's positive charge must be clustered in a tiny region in its center, known as the nucleus.
4.
FLASHCARD QUESTION
Front
What is the main flaw in Thompson's model of the atom?
Back
Thompson's model incorrectly suggested that electrons are embedded in a positively charged 'soup', rather than being in orbits around the nucleus.
5.
FLASHCARD QUESTION
Front
What are isotopes?
Back
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
6.
FLASHCARD QUESTION
Front
What is the periodic table?
Back
The periodic table is a tabular arrangement of elements, organized by increasing atomic number, which shows periodic trends in properties.
7.
FLASHCARD QUESTION
Front
What is an atomic nucleus?
Back
The atomic nucleus is the central part of an atom, containing protons and neutrons, and is positively charged.
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