A.
Explanation:
There are several reasons that Carbon-12 was chosen as the standard for determining the relative mass of other atoms.
- Its abundance on earth
- Carbon-12 is a very stable isotope atom
- Its has the same number of neutrons and protons hence more ideal to use for a precise calculation of <em>amu</em> (atomic mass unit) -
The mass of an atom are based on the ¹/12 mass of Carbon-12.
Answer:
Explanation:Unlike concave mirrors, convex mirrors always produce images that share these characteristics. ... So as an object approaches the mirror, its virtual image on the opposite side of the mirror approaches the mirror as well; and at the same time, the image is becoming larger
Explanation:
the kitchen was very untidy.it smelt musty ,old and stale with not a trail of fry onions,or roast breadffuit or anything to eat.the gas stove did not work for there was no more gas and the cylinder which stood near it looked guilty and forlorn.the coal pot Doris used each time the gas ran out squats near to the door which lead outside.on the long counter were the remains of two mixing bowls and several and saucers.we had always thought that there were only two doors in the kitchen,the one which lead tobthe back garden amd the spare crockery, there was another small door.None of us had seen it before.we had no idea that such a splendid mystery awaited us in the kitchen
