C. slight opposite charges
Explanation: opposites attract
Answer:
300 g
Explanation:
To solve this convert atoms to moles to grams. To convert atoms to moles, you will need Avogadro's number (6.022*10²³ atoms/mol), and to convert moles to grams, you will need the atomic mass of Cl (34.45 g/mol).
Divide the given mass of Cl by Avogadro's number to find moles. Get 8.718..
Multiply the moles by the atomic mass. Get 300.3..
Your answer is 300 g because of significant figures.
Answer:

Explanation:
For any nuclear equation, we should utilize the law of mass conservation and the law of charge conservation. The sum of the masses on the left-hand side of the arrow should be equal to the sum of the masses on the right-hand side of the arrow (those are the superscripts for each nucleus). Similarly, the sums of charges should be equal (this is the law of charge conservation).
Let's say that the missing species is X with a mass of 'M' and charge of 'Z':

Find mass applying the mass balance law:

This means our particle X has a mass of 103. Let's find the atomic number (the charge) same way:

The atomic number of our nucleus is 40. That said, we have:

Find the element in the periodic table with Z = 40. This is Zr. Meaning we can now identify it fully:
