Unit 1 & 2 Science Test

What is the Definition for the Law of Conservation of Mass?

• Too Hard

• Mass cannot be created nor Destroyed

• Photosynthesis

• The number of reactants must be the same number of atoms you end with

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Tags

NGSS.MS-PS1-1

The number of valence electrons in an element affects the reactivity of that element. Which element listed has the fewest valence electrons?

• beryllium (Be)
• sodium (Na) 
• oxygen (O) 
• neon (Ne)

Tags

NGSS.MS-PS1-1

How would this element be classified?

• Metal
• Nonmetal
• Metalloid
• Metamorphic

Tags

NGSS.HS-PS1-1

An atom of which element is represented by this model?

• Neon (Ne)

• Boron (B)

• Nitrogen (N)

• Carbon (C)

Tags

NGSS.MS-PS1-1

The atoms of a certain element each contain 9 protons and 7 valence electrons. Which statement correctly identifies this element and describes the chemical reactivity?

• The element is oxygen, and is highly reactive.

• The element is fluorine, and is highly reactive.

• The element is oxygen, and is not very reactive.

• The element is fluorine, and is not very reactive.

Tags

NGSS.MS-PS1-1

What is the mass number of this atom?

• 1
• 3
• 4
• 7

Tags

NGSS.MS-PS1-1

What group (column) does this element belong to?

• Group 1: Alkali metals

• Group 18: Noble Gases

• Group 2: Alkaline-Earth Metals

• Group 17: Halogens

In the modern periodic table, elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

An atom with 19 protons, and 19 electrons and a mass of 39 has how many neutrons?

• 19
• 39
• 20
• 58

Tags

NGSS.MS-PS1-1