51
You subtract 54 from the mass number.
to find the range of numbers, you take the largest number and subtract the smaller number. 119-(-54)=119+54=173
To find the distance between 27 and -54 on a number line, you can subtract the smaller number from the larger number. The calculation is |27 - (-54)| = |27 + 54| = |81|. Therefore, the distance between 27 and -54 is 81 units.
6x9=54
To find the missing number, you can set up the equation: ( 82 \times x = 54 \times 82 ). Dividing both sides by 82 gives ( x = 54 ). Therefore, the missing number is 54.
54
121
45
It is: 126 plus 54 = 180
The element Xenon (Xe) has an atomic number of 54, which means it has 54 protons. The isotope 118Xe has a mass number of 118. To find the number of neutrons, you subtract the number of protons from the mass number: 118 - 54 = 64. Therefore, 118Xe has 64 neutrons.
48
18