please help me understand my chemistry. my teacher explained it so vaguely. Thanks?

if you have an isotope of 2H, how many protons, neutrons, and electrons are there?

if you have an isotope of 14C then how many of each do you have?

if you have 2 neutrons and 1 electron then what is the isotope?

if you have 238U then how many of each do you have?

if you have an electron of 92 and a mass number of 235, what is the isotope?

and also if you have an atomic number of 82 and a mass number of 206, what is the isotope?

2 Answers

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  • 2 years ago
    Favorite Answer

    A isotope of an element has a 'different' number of neutrons.

    The number of protons and electrons does not alter for a given element.

    [2/1] - H (known as Deuterium (D)) ; 1 proton , 1 neutron, & 1 electrons

    [1/1] - H (known as Protium(H)); 1 proton ; 0 neutrons, & 1 electrons

    [3/1] - H (known as Tritium(T)) ; 1 proton , 2 neutrons, & 1 electron

    [14/6] - C ; 6 protons, 8 neutrons, & 6 electrons

    2 Neutrons & 1 electrons the isotope is deuterium (heavy hydrogen) . NB the question has omitted to mention that there is one proton too!!!!).

    238 - U ; 92 protons, 146 neutrons, & 92 electrons (Known as 'Uranium 238'.

    235 - U ; 92 protons, 143 neutrons, & 92 electrons (Known as 'uranium 235'.

    206 - Pb ; 82 protons, 124 neutrons, & 82 electrons. (Known as 'lead - 206'

    Hope that helps!!!!).

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  • Amy
    Lv 7
    2 years ago

    The name of the element indicates how many protons it has. Carbon has 6 protons / an atom with 6 protons is carbon.

    + or - indicates the difference between number of protons and number of electrons. If neither appears, then there are the same number of electrons as protons.

    The number before the element symbol is its mass. Protons and neutrons each have mass 1; electrons have too little mass to count.

    Because 14C has 6 protons and 14 total mass, it must have 8 neutrons.

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