Which is visible to the naked eye?

Aatoms
Bchemical bonds
Cattractive forces
Dsubstances that atoms make up

Which is the most accurate description of ionic and covalent bonding?

ABoth bonds happen when valence electrons are shared between atoms.
BBoth bonds happen when valence electrons are transferred between ions.
CIonic bonds happen when valence electrons are transferred between ions, while covalent bonds happen when valence electrons are shared between atoms.
DIonic bonds happen when valence electrons are shared between atoms, while

covalent bonds happen when valence electrons are transferred between ions.


Calcium has an atomic number of 20.

How many electrons of a calcium atom are involved in chemical bonding?

A2
B8
C16
D20