900191
Descripción
Test por Jawad Karim, actualizado hace más de 1 año
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Creado por Jawad Karim
hace más de 10 años
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Pregunta 1
Pregunta
Whats an element?
Respuesta
-
A substance made of one atom type.
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A substance made of several atoms
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A substance that keeps reactions happening in the body
Pregunta 2
Pregunta
Neutrons have a charge of +1
Respuesta
- True
- False
Pregunta 3
Pregunta
Why is argon unreactive?
Respuesta
-
It is in Group 8
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It has a full outer shell of electrons
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It has the lowest number of outermost shell electrons out of any element in the entire periodic table.
Pregunta 4
Pregunta
Dmitri Mendeleev created the better version of the Periodic Table
Respuesta
- True
- False
Pregunta 5
Pregunta
Vertical columns in the P. Table are called groups. Rows in the P.Table are called Periods
Respuesta
- True
- False
Pregunta 6
Pregunta
Pb is the symbol for neon.
Respuesta
- True
- False
Pregunta 7
Pregunta
When drawing atoms, the __________ shell must always be filled first before moving on to the next one.
Respuesta
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lowest
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highest
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biggest
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smallest
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furthest from the nucleus
Pregunta 8
Pregunta
An atom always wants a full outermost shell
Respuesta
- True
- False
Pregunta 9
Pregunta
Balance this equation:
H2SO4 + NaOH ---->Na2SO4 + H2O
Respuesta
-
H2SO4 + 2 NaOH ---> NaSO4 +2H2O
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2H2SO4 +3 NaOH ---->Na SO4 + 4 H2O
Pregunta 10
Pregunta
Why do equations need to be balanced?
Respuesta
-
Because atoms can't be created or destroyed in a reaction
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Because #YOLO
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Because they're easier to understand that way and so scientists made that rule compulsory.
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