Introduction to the atom and the periodic table pre-test

Tin (Sn) and Lead (Pb) are both members of the came group as carbon, as shown by the periodic table, which of the following elements would also be a member of this group and why?

• Iron(Fe), because it is a metal like tin and lead

• Krypton (Kr) because it is an inert gas like tin and lead

• Calcium (Ca) because it has reactivity similar to that of tin and lead

• Silicon (Si) because it has conductivity similar to that of tin and lead

Tags

NGSS.MS-PS1-1

Which of the following is an element?

• salt

• oxygen

• vinegar

• water

A model of the most basic unit of oxygen is shown. Which of the following is true of oxygen?

• Oxygen is an element because its most basic unit is a single type of atom

• Oxygen is a compound because its most basic unit is a single type of atom

• Oxygen is a mixture because its most basic unit contains more than one particle

• Oxygen is a compound because its most basic unit contains more that one type of particle

Tags

NGSS.MS-PS1-1

How is an element different from a compound?

• an element is highly reactive, and a compound is stable

• an element exists in any state, and a compound is only a liquid

• an element contains multiple substances, and a compound contains only one pure substance

• an element is made of a single type of atom, and a compound is made of two or more atom types

Nitrogen is a gas at room temperature and standard pressure. It is also a Group 15 element as shown. Which statement about the other elements in Group 15 is true?

• They look similar to oxygen

• They react in a way similar to how nitrogen reacts

• They have the same density as nitrogen when under the same conditions

• They are, like nitrogen, gases at room temperature and standard pressure

Which elements in the periodic table have similar properties?

• a metal and a noble gas

• a metal and a non metal

• two elements in the same group

• two elements in the same period

Based on the periodic table of elements, which of the following sets of elements have similar properties?

• Pb, Sn, Kr

• Ne, N, O

• Cl, Br, I

• O, S, N

What is the atomic number of an element based upon?

• mass of it's nucleus

• number of electrons around it's core

• number of protons in its nucleus

• number of neutrons in its nucleus

A chemist determines that the atom she is studying has eight negatively charged particles outside the nucleus. What does this indicate about the atom?

• it is very unstable

• it contains eight neutrons

• it contains eight electrons

• it is a negatively charged ataom

Tags

NGSS.MS-PS1-1

Audra is looking at the diagram of an atom. Which particle(s) does she see inside the nucleus?

• electrons only

• protons only

• electron and protons

• protons and neutrons