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☆☆☆☆☆Cards in this guide (14)
What is the photoelectric effect
Apexvs.
Electrons are knocked off atoms, causing electricity to flow.
How many elements were there in 1860
63 elements had been discovered so far.
What does the number above the symbol represent
The atomic number.
What is a reason an engineer may choose to use a prefabricated building component
She wants to use standard materials to minimize negtive environmental impacts
What do all atoms of any single element have in common
All atoms of any single element have the same number of protons and electrons.
What law states that energy is never created or destroyed
The law of conservation of energy
What does adding a neutron to an atoms nucleus do to the atoms mass
we can not add neutron
Are elements arranged in in a periodic table or an element table
The elements are arranged in a periodic table. Refer to the related link for a printable periodic table.
What makes up nearly all of the atom's mass
The nucleolus.
An atom of aluminum (Al) has an atomic number of 13 and a mass number of 27. How many neutrons does it have
14
Chlorine (Cl) has an atomic number of 17. It often forms an ion by gaining 1 electron. What would its charge be
-1
Na-23 has 12 neutrons what is its atomic number
11
An engineer chooses to use a composite material that incorporates concrete and recycled glass for the floors of a new building. This is an example of
Green design
which of the following properties describes plasma
it can change shape and volume
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