Regent's Chemistry

Which formula represents a polar molecule?

• Cl₂

• CH₄

• HCl

• CO₂

Which compound has both ionic and covalent bonds?

• CH₄

• CO

• CaCl₂

• MgSO₄

When iron is mixed with sulfur, the iron

• becomes a covalent compound

• retains its magnetic properties

• loses its magnetic properties

• transfers its magnetic properties to sulfur

As the elements in Group 2 in the periodic table are considered in order of increasing atomic number, there is a general increase in

• stability

• atomic radius

• electronegativity

• first ionization energy

Tags

NGSS.HS-PS1-1

How would you classify NaCl?

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1

Which pair of atoms will form ionic bonds?

• S and F

• Mg and O

• F and Cl

• H and Ne

Under which conditions does a gas behave least like an ideal gas?

• high temperature and low pressure

• high temperature and high pressure

• low temperature and low pressure

• low temperature and high pressure

What does b represent?

• Proton

• Neutron

• Electron

Tags

NGSS.MS-PS1-1

What is the symbol of this element?

• Calcium

• P

• Ca

• C

Gold is an example of a(n) 

• pure element

• pure compound

• pure mixture