Science STAAR Quick Review (2) 8.5 ABCDE

What is the total number of protons, neutrons, and electrons in a cadmium, Cd, atom.

• 48

• 112

• 160

• 208

Tags

NGSS.MS-PS1-1

Which statement correctly describes the location and charge of the electrons in an atom?

• The electrons are inside the nucleus and have no charge

• The electrons are outside the nucleus and have no charge.

• The electrons are inside the nucleus and have a negative charge.

• The electrons are outside the nucleus and have a negative charge.

• The electrons are outside the nucleus and have a positive charge.

Which statement accurately describes atoms of tin, Sn?

• Tin atoms have 50 protons

• Tin atoms have five valence electrons.

• Tin atoms have 119 neutrons

• Tin atoms have 68 electrons

• Tin atoms have 4 energy levels

Tags

NGSS.MS-PS1-1

Which students responses are correct?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.MS-PS1-1

Based on the data, which periodic table or tables shows the correct location of Element I?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Which pair of properties describes the elements in Group 18?

• They are chemically stable and liquid at room temperature.

• They have eight valence electrons and are flammable.

• They are magnetic and boil at low temperature

• They are gaseous at room temperature and chemically stable.

Tags

NGSS.HS-PS1-1

Based on this information, which of these statements is not true?

• A molecule of sorbitol contains three more oxygen atoms than a molecule of glutamine

• A molecule of lactose contains twice as many atoms as a molecule of fructose does.

• A molecule of fructose contains four more atoms than a molecule of glutamine does.

• A molecule of lactose contains twice as many carbon atoms as a molecule of sorbitol does.

Tags

NGSS.MS-PS1-1

Which substances have the same number of carbon atoms?

• Substances 1 and 2

• Substances 2, 3, and 4

• Substances 2 and 3 only

• Substances 1 and 3

• Substances 1 and 4

Tags

NGSS.MS-PS1-1

Which observations of this process provides evidence of a chemical reaction?

• Hot water heated the aluminum foil.

• The liquid solution changed color.

• The pan was lined with aluminum foil.

• The hot water cooled

Tags

NGSS.MS-PS1-2

Which of these provides evidence that a chemical reaction occurs?

• A gas is present.

• The total number of atoms remains unchanged.

• The state of matter remains the same.

• A brown gas is produced.

Tags

NGSS.MS-PS1-2