Identifying Periodic Table Elements by Characteristics

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

• Element 1 has the same atomic mass as Element 4

• Element 3 has a very similar chemical properties as Element 4

• Element 1 has very similar chemical properties as Element 3

• None of the above

Tags

NGSS.MS-PS1-1

One of the advantages of classifying elements systematically in the Periodic Table of Elements is

• Making it easier for the scientists to choose atoms

• Knowing the number of neutrons in an element

• Predicting the chemical characteristics of an element

• Identifying the scientist who discovered the element

The idea of "triads" of elements with similar properties was due to

• John Newlands

• Johann Dobereiner

• Dmitri Mendeleev

• Henry Moseley

The "Law of Octaves" stated that

• The properties of the elements repeated every eighth element when arranged by their atomic mass

• Elements could be classified in groups of three based on their mass and properties

• The properties of the elements repeated of a regular basis when arranged by their atomic number

• doubling the frequency of a tone raises its pitch by an octave

Element R and Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element R has fewer energy levels than Element Q. Which statement best describes the positions of the two elements in the periodic table?

• the two elements are in the same period, with element R the first element in the period and element Q the last element

• the two elements are side by side in the same period, with element Q to the left or element R

• the two elements are in the same group, with element R just above element Q

• the two elements are in the same group, with element Q at the top of the group and element R at the bottom

Tags

NGSS.MS-PS1-1

A chemist is identifying the elements present in a sample of seawater.  What characteristic of an element's atoms always determines the element's identity?

• The number of neutrons.

• The number of protons.

• The number of valence electrons.

Elements on the periodic table that have physical and chemical properties of both metals and nonmetals are called _____________.

• metals

• nonmetals

• metalloids

• transition elements

What element is in period 3 group 18?

• Aluminum

• Potassium

• Argon

• Neon

What element has the same number of energy levels as Silicon?

• Sodium (Na)

• Carbon (C)

• Germanium (Ge)

• Boron (B)

What group and period does this element belong in?

• period 1 and group 3

• period 3 and group 1

• period 2 and group 3

• period 3 and group 2

Tags

NGSS.MS-PS1-1