Count your ends

Also consider indenting your code properly. You're missing an end for the if statement just inside of your first event connection.

tool = script.Parent
player = game.Players.LocalPlayer
mouse = player:GetMouse()
reload = true
tool.Activated:connect(function()
    if reload == true then
        reload = false
        local Part = Instance.new("Part", workspace)
		-- What happened to this indent?
    Part.Size = Vector3.new(0.1,0.1,0.1)
    Part.Shape = ("Ball")
    Part.Position = Vector3.new(-3.5,0.5,4.5)
    Part.CFrame = tool.Handle.CFrame
    Part.CFrame = CFrame.new(Part.Position,mouse.Hit.p)
    local v = Instance.new("BodyVelocity", Part)
    v.velocity = Part.CFrame.lookVector *90
    v.maxForce = Vector3.new(math.huge, math.huge, math.huge)
    Part.Touched:connect(function(hit)

        if hit.Name == "Snow" then
            local Snow = hit
            Snow.Transparency = 0.1
            wait(0.1)
            Snow.Transparency = 0.2
            wait(0.1)
            Snow.Transparency = 0.3
            wait(0.1)
            Snow.Transparency = 0.4
            wait(0.1)
            Snow.Transparency = 0.5
            wait(0.1)
            Snow.Transparency = 0.6
            wait(0.1)
            Snow.Transparency = 0.7
            wait(0.1)
            Snow:Destroy()
            Part:Destroy()
        end 
    end)
    wait(3)
    reload = true
	end
end)