Answer: 11
Explanation:
The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23. We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11
Answer: quote from a famous biology scientist
Explanation:
a quote from Rachel Carson which I think is beautiful, "The more clearly we can focus our attention on the wonders and realities of the universe about us, the less taste we shall have for destruction."
Enzymes acts as a catalyst in chemical reactions to speed up the rate of reaction.
Enzymes are not necessarily needed because substrates can disintegrate on their own, but enzymes are helpful to aid this process.
1. After 4.5 billion years- 200 atoms.
After 9 billion years- 100 atoms.
After 13.5 billion years- 50 atoms.
3. Carbon-14 has a much shorter half life than the elements listed in the chart, therefore it would decay much quicker.