MC Ch 2 homework problems and answers

An atom has a mass number of 32 and 17 neutrons. What is the atomic number of this atom?

atomic number = 15

The atomic number of carbon is 6. What is the mass number of a carbon atom with 5 neutrons?

mass number = 11

An atom of chlorine is represented by 37/17 Cl. How many neutrons are in the nucleus of this atom?

20

Specify the number of protons, neutrons, and electrons in the neutral atom iron-56.

26 protons 30 neutrons 26 electrons

Give the nuclear symbol for the isotope of argon for which A=38?

38/18 Ar

Question to differ between heterogenous and homogeneous

Do any of the given mixtures look like they contain multiple components? If you can see distinct parts, then the mixture is heterogeneous. If you cannot see distinct parts, then the mixture is likely to be homogeneous.

Although _____ mixtures are not uniform and so different patches are often visible, _____ mixtures have uniform composition throughout.

Heterogeneous; homogeneous