Atomic Structure and the Periodic Table of Elements Review

In a neutral atom, the number of protons equals the number of

• nuclei.

• isotopes.

• electrons.

• neutrons.

Which particles in an atom have a negative electric charge?

• electrons

• neutrons

• protons

An atom of an element with the same number of protons and a different number of neutrons is called

• an ion.

• an isotope.

• a valence electron.

• a metalloid.

What will the atomic mass be for the atom described below?

Number of Protons = 15

Number of Neutrons = 16

Number of Electrons = 15

• 30

• 31

• 46

• 15

Tags

NGSS.MS-PS1-1

If an atom of an element has 15 protons, 15 electrons and 16 neutrons, what will its atomic number be?

• 30

• 31

• 46

• 15

Which of the following are true about elements?

I. All the particles are alike in an element.

II. Elements can be broken down into simpler substances.

III. Elements have unique sets of properties.

IV. Elements can join together to form compounds.

• only I

• I and II

• I, II, and IV

• I, III, and IV

Which element am I?

I am in period 3, and I have five valence electrons.

• arsenic

• boron

• phosphorus

• vanadium

In the periodic table, the most reactive metals are found

• in group 1 (alkali metals family).

• in period 1.

• in groups 13 through 16.

• in periods 6 and 7.

In the Periodic Table of Elements, most elements are in what category or type?

• halogens

• metalloids

• metals

• nonmetals

How many total electrons are in a neutral atom of lithium?

• 3

• 4

• 6.9

• 1

Tags

NGSS.MS-PS1-1