Atoms and the Periodic table

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

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

This is a chemical formula for glucose, a type of sugar. What statement is true about glucose?

• Glucose is an element, because it can be separated into smaller components

• Glucose is an element, because it is made up of more than one kind of atom

• Glucose is a compound, because it is made up of more than one element

• Glucose is a compound, because it is made of protons, neutron and electrons

Tags

NGSS.MS-PS1-1

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

Tags

NGSS.HS-PS1-8

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