Sc.8.P.8.1

Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr) are in the same column in the periodic table. Why are these elements in the same column in the periodic table? 

• They are the same size
• They react with each other
• They have similar properties
• They have the same number of protons

The images below represent the atoms in a substance as it changes state. Use these images to answer the questions that follow. Which term best describes the substance represented by Figure 1?

• compound 
• liquid
• solid
• element

Tags

NGSS.MS-PS1-4

Which statement is true about the subatomic particles that make up atoms?

• Subatomic particles can be classified as acids, bases, and salts
• The same types of subatomic particles make up all of the elements
• All subatomic particles have either a negative or positive charge
• Subatomic particles retain the properties of elements

Tags

NGSS.HS-PS1-8

Any atom that has 19 protons is a potassium (K) atom. Which statement best describes what would happen if a proton was added to potassium atom?

• The atom will lose electrons
• The atom would have a negative charge.
• The atom would no longer be potassium
• The atom would have a smaller atomic number.

Tags

NGSS.MS-PS1-1

John knows that the atomic number of the element Chlorine, Cl, is 17. He also knows that one  particular isotope of chlorine has a mass of 35. How many neutrons can be found in the nucleus of this isotope of chlorine?

• 17
• 18
• 35
• 70

Carbon is an element. What is the smallest particle of carbon that has the same chemical    properties of carbon?

• an atom of carbon
• a proton from a carbon atom
• an electron from a carbon atom
• a molecule that contains carbon

Tags

NGSS.MS-PS1-1

Each element is made up of different atoms. The table below compares two elements. What do the elements in the table have in common?

• Atoms in each element have 10 nuclei
• Atoms in each element have 10 protons.
• Atoms in each element have 10 neutrons
• Atoms in each element have 10 electrons

Tags

NGSS.MS-PS1-1

What do elements in the same group on the periodic table have in common?

• They have similar chemical symbols
• They have the same atomic number.
• They have similar chemical properties
• They have the same average atomic mass

Which of the following could represent a chemical change? Atoms are represented by circles, and molecules are represented by circles that are connected to each other. The different colored circles represent different kinds of atoms.

• A
• B
• C
• D

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mr. Carter has given his students a worksheet with the illustration shown below, and tells the students that the diagram on the left represents atoms in a liquid state. He asks the students to use the box on the right to draw their own diagram representing atoms in a solid state. Which of the following best describes one way the students can fill in the second box to represent a solid?

• The students should draw more circles in the second box since the atoms are closer together in solid form.
• The students should not draw arrows in the second box because the atoms do not move at all in solid form
• . The students should draw smaller circles in the second box because the electrons in the atoms are more tightly bound to the nuclei in solid form.
• The students should draw lines connecting the circles in the second box since the atoms in a solid are joined by chemical bonds.

Tags

NGSS.MS-PS1-4