Many style sheets suggest spelling out the numbers from 1 to 10, or even 1 to 20, and using numerals for larger values (Penn State's in-house sheet says 1 to 100, which is atypical). You can almost always use the written form depending on the application.
Ten.
In formal writing, the number 10 should generally be spelled out as "ten."
You should write it in full in any formal or academic writing.
In formal writing, numbers under 10 should generally be spelled out.
The number ten in Spanish is "diez".
The ordinal form of 12 is "twelfth". This is somewhat easy to forget, since in dates, numbers are not spelled out, and numbers past 10 are frequently written as "12th", etc. in text.
911
To calculate the number of atoms in 10 grams of gold, first determine the molar mass of gold, which is approximately 197 grams per mole. Using Avogadro's number, which is (6.022 \times 10^{23}) atoms per mole, you can find the number of moles in 10 grams of gold by dividing 10 grams by the molar mass (197 g/mol). Finally, multiply the number of moles by Avogadro's number to find the total number of atoms: [ \text{Number of atoms} = \left( \frac{10 \text{ g}}{197 \text{ g/mol}} \right) \times 6.022 \times 10^{23} \text{ atoms/mol} \approx 3.05 \times 10^{22} \text{ atoms}. ]
In APA format, numbers 10 and above are typically written as numerals, while numbers below 10 are spelled out.
The number 10,250 is spelled as "ten thousand two hundred fifty."
To calculate the number of atoms in a given amount of (^{13}\text{C}), you need to know the amount in moles. Use Avogadro's number, which is approximately (6.022 \times 10^{23}) atoms/mole. Multiply the number of moles of (^{13}\text{C}) by Avogadro's number to find the total number of atoms. For example, if you have 2 moles of (^{13}\text{C}), the calculation would be (2 \text{ moles} \times 6.022 \times 10^{23} \text{ atoms/mole} = 1.2044 \times 10^{24} \text{ atoms}).
In formal writing, it is incorrect to use actual digits to represent numbers 1-10. In stead, these numbers should be spelled out according to formal guidelines.