2.   Which of these recorded observations is qualitative, rather than quantitative?

• a.  A chemical reaction is complete in 2.3 s.
• a.  The solid has a mass of 23.4 g.
• The compound melts at 87.5°C.
• Iron is denser than aluminum.

8.  Which are the sublevels in an energy level of n = 3?

• s, p,  and f
• s, d, and f
• s, p, and d
• p, d and f

9.  What electron configuration rule states: All orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron.

• Pauli Exclusion Principle
• Hund's Rule
• Aufbau Principle
• Bohr Model of the the atom

10. What electron configuration rule states:  No two electrons in the same atom can have the same four quantum numbers.

• Pauli Exclusion Principle
• Hund's Rule
• Aufbau Principle
• Bohr model of the atom

11.  What electron configuration rule states: An electron occupies the lowest energy orbital that can receive it. 

• Pauli Exclusion Principle
• Hund's Rule
• Aufbau Principle

12.  Which element does the following configuration represent?  1s²,2s²,2p⁶,3s²,3p⁵

•    Phosphorus
•      Chlorine
•    Silicon
•     Argon

Tags

NGSS.HS-PS1-1

13.  What is the correct electron configuration for Calcium?

• a.  1s²,2s²,2p⁶,3s²,3p⁶,4s¹
• a.  1s²,2s²,2p⁶,3s²,3p⁶,4s²
• a.  1s²,2s²,2p⁶,3s²,3p⁵,4s²
• 1s²,2s²,2p⁶,3s³,3p⁵,4s¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

Which state of matter has tightly packed molecules?

• solid
• liquid
• gas

Tags

NGSS.5-PS1-1

The state of matter that has no definite size or shape is

• Solid
• Liquid
• Gas

Tags

NGSS.MS-PS1-4