Science 6 Ch 7

Identify the characteristics as belonging to an acid (A) or a base (B): lemons, vinegar, tomato juice

• Acid

• Base

slippery to touch

• Acid

• Base

sour taste

• Acid
• Base

can burn; can be corrosive

• Acid
• Base

bitter taste

• Acid

• Base

baking soda, soap, bleach

• Acid

• Base

The sum of the number of protons and neutrons results in an atom's approximate ____.

• pH scale

• electrons

• atomic number

• atomic mass

Scientist ____ developed a simplified model of an atom.

• Niels Bohr

• Dmitri Mendeleev

• Ernest Rutherford

• Robert Boyle

The scientist ____ developed the periodic table of the elements.

• Niels Bohr

• Dmitri Mendeleev

• Ernest Rutherford

• Robert Boyle

When positively and negatively charged ions attract each other they form a(n) ____.

• indicator

• neutron

• ionic bond

• covalent bond