Entrance Test Year 11

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

Tags

NGSS.HS-PS1-1

Atoms that have a high electronegativity, _______________.

• give up their electrons more easily.
• hold on to their electrons more tightly.
• have more electron shells.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are the elements in group 18 (the far right) of the periodic table called?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

Diagram shows the symbol of neon. Which statements is not true about neon?

• Neon exist as a monatomic elements

• Neon has low melting and boiling point

• Neon has a low density

• Neon reacts with bromine to form a covalent compound

Tags

NGSS.HS-PS1-1

A construction worker wants to weld two pieces of iron together during the construction of a tall building. Which of the following elements, J, L, M or Q, is the most suitable to be used to provide an atmosphere which can prevent the hot iron from reacting with oxygen in the air during welding?

• 
• 
• 
• 

Helium is a good insulator. Why?

• Helium do not contains mobile ions

• Helium do not contains mobile electrons

• Helium is not inert

• Helium is light

Tags

NGSS.HS-PS1-3

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order

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NGSS.HS-PS1-5

List four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

Tags

NGSS.HS-PS1-5

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger
• Blue, because the activation energy is lower
• both reaction progress at the same rate

Tags

NGSS.HS-PS1-4