(Errors) CBA #1 Review Quizizz #2!!

How many protons, neutrons, and electrons are present in an atom of Zirconium, Zr, with a mass number of 40?

• 1. 91 protons

  2. 91 neutrons

  3. 40 electrons

• 
  

  40 protons

  51 neutrons

  40 electrons

• 
  

  40 protons

  40 neutrons

  51 electrons

• 
  

  40 protons

  91 neutrons

  40 electrons 

Tags

NGSS.MS-PS1-1

Group 18 is _________ at room temperature and chemically ______________. ​​​​​​​ ​​​​​​​ ​​​​​​

• gaseous, flammable

• liquid, unstable 

• liquid, stable

• gaseous, stable

If an object has a density of less than 1 g/ml it will _______.

• float

• sink

If an object has a density of more than 1 g/ml it will _______.

• float

• sink

An unknown element has many of the same physical and chemical properties as lithium and potassium, but has a lower atomic mass than either of these elements.  This element could be ____. 

• Magnesium

• Hydrogen

• Sodium

• Beryllium

Aluminum, oxygen, and carbon are elements found on the periodic table. Tests involving these three elements would show that at normal room temperature - 

• Aluminum is malleable and oxygen conducts electricity

• Carbon is malleable and conducts electricity 

• Aluminium is malleable and conducts electricity

• All three elements are malleable and conduct electricity

The sample has a mass of 29.4 g and a volume of 4.4 cm3. What is the density of the mineral sample?

• 129.36 g/cm3

• 25 g/cm3

• 33.8 g/cm3

• 6.68 g/cm3

Which statement best describe the charges on the particles in this model?

• Particle A will have a negative charge in the nucleus

• Particle B will have a negative charge in the nucleus

• Particle C will have a negative charge in the nucleus

• Particle C will have a negative charge in the electron cloud/shells

Tags

NGSS.MS-PS1-1

Which statement best describe the charges on the particles in this model?

• Particle A will have a positive charge in the nucleus

• Particle B will have a positive charge in the electron cloud/ shells

• Particle C will have a negative charge in the nucleus

• Particle A will have a negative charge in the electron cloud/shells

Tags

NGSS.MS-PS1-1

Which statement best describe the charges on the particles in this model?

• Particle A will have a negative charge in the nucleus

• Particle B will have a positive charge in the electron cloud/ shells

• Particle B will have a neutral charge in the nucleus

• Particle A will have a negative charge in the electron cloud/shells

Tags

NGSS.MS-PS1-1