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Solnce55 [7]
3 years ago
7

2. How many of the heavier elements do we know of?

Chemistry
1 answer:
Pavel [41]3 years ago
4 0
A heavy element is an element with an atomic number greater than 92. The first heavy element is neptunium (Np), which has an atomic number of 93. Some heavy elements are produced in reactors, and some are produced artificially in cyclotron experiments.
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This question needs details or clarity. It is not currently accepting answers. Want to improve this question
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BRAINLIEST IF CORRECT
zhannawk [14.2K]

Answer:

1 a person sings into a microphone

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Write 0.00000009345 in Engineering Notation with 3 significant figures
melisa1 [442]

Answer:

93.43\times 10^{-9}

Explanation:

Scientific notation is the way of writing numbers which are either large or small. The number is written in the scientific notation when the number is between 1 and 10 and then multiplied by the power of 10. Engineering notation is the same version of the scientific notation but the number can be between 1 and 1000 and in this exponent of the ten is divisible by three.

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The given number:

0.00000009345 can be written as 93.425\times 10^{-9}

Answer upto 4 significant digits = 93.43\times 10^{-9}

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3 years ago
2Na(s) + 2H,O(l) — 2NaOH(?) + H, (g)<br> 0 what is the missing symbol
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Answer:

the symbol that is missing might be 2.

Explanation:

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(d)
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