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- 1What makes up the mass number?Protons and neutrons make up the vast majority of the atom. The number of protons plus neutrons is called the mass number.
- 2What is the mass number equation?Number of Neutrons = mass number - atomic number
- 3What are the reactants and products?Reactants - The staring substances used in reactions.
Products - The new substances formed in a reaction. - 4What do protons and neutrons have the same of?They have the same mass
- 5What is the number of electrons in an atom always equal to?The number of electrons in an atom is always equal to the number of protons.
- 6What are the elements in the periodic table arranged by?Elements in the periodic table are arranged in order of their atomic number.
- 7What are the number of protons in each atom of an element called?The Atomic Number
- 8Who developed the first modern periodic table?Dmitri Mendeleev
- 9What was Mendeleev's theory?That switching the order of elements if they fitted better in other groups. He was correct.
- 10What was atomic mass previously called?Atomic weight
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- Fichas sobre Sin título, creado por Ellie I el 28/01/2023.
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- Ellie I
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