HW 5.2 Regents Review Day 2

In the atom diagram shown, E is pointing to

• An electron
• a proton
• a neutron
• the nucleus

Tags

NGSS.MS-PS1-1

In the atom diagram shown, A is pointing to the darker particles, these are known as

• electrons

• protons

• neutrons

• the nucleus

Tags

NGSS.MS-PS1-1

B and C are found in the ______ of an atom.

• electron cloud
• Space
• Nucleus
• Outside

Tags

NGSS.MS-PS1-1

A molecule is________

• two ions held together by opposite charges
• smaller than an atom
• can be physically separated into smaller atoms
• more than one atom bonded together by covalent bonds

Tags

NGSS.MS-PS1-1

What charge does an electron have?

• Negative
• Positive
• Neutral
• Contrated

In this chemical equation, the elements in red are the_______.

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

Tags

NGSS.HS-PS1-1

What is a valence electron?

• an electron that is found in the outermost orbital of an atom. 
• an electron found in the innermost orbital of an atom.
• an electron found in the middle orbital.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An ionic bond forms when 

• Valence electrons are shared
• a sea of mobile electrons surround the cations
• valence electrons are transferred between atoms
• none of the above

Tags

NGSS.HS-PS1-2

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.
• electrons are completely transferred between two atoms.
• pairs of electrons are shared between two atoms.
• ions are held together by opposite charges.

Tags

NGSS.HS-PS1-2