Question

Select all that apply.

1: Which of the following particles are of approximately equal mass?

A: protons
B:electrons
C:neutrons
D:quarks
------------------------------------------------------------------------------------------------------------------------------
2: If the atomic number of an element is 16, then it has 16 electrons.

True
False
------------------------------------------------------------------------------------------------------------------------------

3: An unknown substance is tested and found to have the following physical properties:

brittle
fair conductor of electricity
dull (not shiny)

The substance is most likely a _____.

A:metal
B:metalloid
C:nonmetal
D:can not be determined without more data
---------------------------------------------------------------------------------------------------------------------------

Answer 1

its a and b

Step-by-step explanation:

i got it right on test

Answer 2

1)Protons and Neutrons have approximately equal masses

2)TRUE

3) B-Metalloid