SS Unit 1 Test Review

A measurement is given to you with the SI unit of Kelvin. What is this a measure of?

• Amount of substance

• Electric current

• Mass

• Temperature

Tags

NGSS.MS-PS1-4

According to the model of the atom hypothesized by Neils Bohr, where can electrons be found around an atom's nucleus?

• 
  bundled together as a separate negatively charged nucleus bonded to the positively charged nucleus

• 
  at certain distances away from the nucleus in shells

• 
  inside and outside of the nucleus

• 
  any distance away from the nucleus

Who is considered the father of the periodic table for creating an organizational system which predicted the properties of unknown elements?

• 
  Julius Lothar Meyer

• 
  Earnest Rutherford

• 
  Dmitri Mendeleev

• 
  John Newlands

What are the elements in group 18 called?

• noble gases

• 
  lanthanides

• 
  halogens

• 
  alkali metals

The International Union of Pure and Applied Chemistry is an organization which heads what important responsibility in the field?

• 
  manufacturing guidelines

• the marketing of chemicals for consumers

• 
  the approval of new researchers

• 
  the naming of chemicals

How is the modern periodic table organized?

• 
  electronegativity

• 
  number of protons in the nucleus

• 
  number of energy shells

• nonmetals, metals, and metalloids

Which is a chemical property of matter?

• 
  hardness

• reactivity

• 
  malleability

• color

An element is characterized as having high density, luster, and being electrically conductive. To which class does this element belong?

• 
  metals

• 
  metallloids

• 
  noble gases

• 
  nonmetals

Which periodic table group is characterized by having seven valence electrons?

• 
  alkali earth metals

• 
  alkali metals

• 
  the carbon group

• 
  the halogens

How did Democritus contribute to the understanding of matter?

• He saw the first atom under a microscope.

• He is credited with first proposing the idea of atoms.

• 
  He is credited with being the first to think of elements combining to make more complex forms of matter with his idea of fire, water, air, and earth.

• 
  He created the first school of science.