Answer:
11
Explanation:
The atomic number = number of protons. The mass number (23) = sum of number of neutrons and protons. Since you know the mass number is 23 and it has 12 neutrons, 23-12 gives you 11 protons, so its atomic number is 11.
If you want additional help in chemistry or another subject for FREE, check out growthinyouth.org
Don't touch your eyes.
Never taste-test unless the teacher tells you to.
Do not touch anything without directions.
Wear safety goggles.
Wash your hands after each experiment.
Wear proper lab clothes.
Do not mishandle lab equipment.
Clean up your workplace.
Act serious; no horseplay!
Report accidents to the teacher right away!
Have a great day, scholar!
Third quarter (or last quarter)
To get temperature in Celsius: temperature in Kelvin - 273.15: degrees C=312-273.15= 38.85
To get farenheit from Celsius: (9/5degrees C) + 32 = 104.93.
Stephen cannot go to school today and his dad should probably call the doctor for that high fever
