Who developed the modern periodic table?

• Bohr

• Einstein

• Newton

• Mendeleev

Which subatomic particle is different in number in isotopes, such as Carbon-12 and Carbon-14?

• protons

• electrons

• neutrons

• atoms

Tags

NGSS.HS-PS1-8

Which best describes the use of properties to produce the correct model of the periodic table?

• The arrangement of the elements is unrelated to physical properties

• Elements are arranged into groups based on similar properties

• Physical properties are only used to differentiate between metals and nonmetals

• Elements are arranged from left to right according to the increase of metallic properties

Why are the noble gases, such as Helium (He) and Neon (Ne), grouped together in the periodic table?

• They are nonreactive gases

• They are highly reactive metallic solids

• They are dangerous gases when combined with water

• They are liquid at room temperature and have high boiling points

The properties of element X are: MALLEABLE, DUCTILE, SHINY, CONDUCTS HEAT AND ELECTRICITY. Which represents the identity of element X?

• Carbon (C)

• Sulfur (S)

• Copper (Cu)

• Iodine (I)

If an element has no electrons to share and is stable, what family is it found in?

• Noble gases

• Alkali Metals

• Carbon

• Halogens

Which subatomic particle determines the reactivity of groups of elements in the periodic table?

• atoms

• electrons

• protons

• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When determining the number of neutrons in an atom, what do you do?

• Add the protons and electrons

• Add the atomic number and atomic mass

• Subtract the atomic mass from the atomic number

• Subtract the atomic number from the atomic mass

Tags

NGSS.MS-PS1-1

What describes the reactivity of Group 1, the Alkali Metals?

• Reactivity increases down a group

• Reactivity decreases down a group

• Reactivity increases left to right across a period

• Reactivity decreases left to right across a period

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What does the atomic number represent?

• atomic mass

• number of atoms

• number of protons

• number of neutrons