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Apa yang ditunjukkan oleh nomor atom suatu unsur?

1. AJumlah proton dalam setiap atom
2. BJumlah neutron dalam setiap atom
3. CJumlah total proton dan neutron dalam inti
4. DJumlah atom dalam satu mol unsur itu

What is plasma, as a state of matter?

1. AA solid that conducts electricity
2. BA very hot gas in which atoms have lost electrons and become ions
3. CThe liquid part of blood
4. DA liquid that has been cooled below its freezing point

What is a beta particle?

1. AA helium nucleus with two protons and two neutrons
2. BA wave of visible light
3. CA neutron that leaves the nucleus
4. DA high-energy electron released from a nucleus

Which list is in order from smallest to largest mass?

1. AGram, milligram, kilogram
2. BMilligram, gram, kilogram
3. CKilogram, gram, milligram
4. DMilligram, kilogram, gram

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A20 g
2. B40 g
3. C10 g
4. D0 g

Which type of bond holds the two atoms together in a nitrogen molecule, N₂?

1. AA single covalent bond
2. BAn ionic bond
3. CA double covalent bond
4. DA triple covalent bond

Using PV = nRT with R = 0,082 L·atm/(mol·K), how many moles of gas are in 24,6 L at 1 atm and 300 K?

1. A0,5 mol
2. B2 mol
3. C300 mol
4. D1 mol

How does a rise in temperature affect how much carbon dioxide gas can dissolve in a soft drink?

1. ALess gas dissolves, so warm drinks go flat faster
2. BThe gas turns into a solid at higher temperature
3. CTemperature has no effect on gas solubility
4. DMore gas dissolves, so warm drinks stay fizzy for longer