< Question 7 of 31 > Attempt 2
Classify the phrases pertaining to pure substances and mixtures as either true or false.
True
False
Answer Bank
Pure substances cannot be separated by physical means.
The components of a homogeneous mixture are chemically combined.
Homogeneous mixtures have uniform properties throughout.
Heterogeneous mixtures contain more than one part, and each part has its own properties.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

the correct answer to this question is 2